Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Vulnerabilities
| Vulnerability |
Severity |
 CVSS |
Dependency |
Type |
Fixed in (python version) |
Remediation Possible** |
| CVE-2026-15308 |
 High |
7.5 |
python-3.11.0-he550d4f_1_cpython.conda |
Direct |
N/A |
❌ |
| CVE-2026-11972 |
High |
7.5 |
python-3.11.0-he550d4f_1_cpython.conda |
Direct |
N/A |
❌ |
| CVE-2026-12003 |
 Medium |
6.6 |
python-3.11.0-he550d4f_1_cpython.conda |
Direct |
python - 3.13.14,python - 3.14.6,https://github.com/python/cpython.git - v3.12.11,https://github.com/python/cpython.git - v3.13.4,https://github.com/python/cpython.git - v3.7.13,https://github.com/python/cpython.git - v3.9.23,https://github.com/python/cpython.git - v3.14.6,https://github.com/python/cpython.git - v3.8.19,https://github.com/python/cpython.git - v3.10.18,https://github.com/python/cpython.git - v3.11.13 |
❌ |
| CVE-2026-17084 |
Medium |
6.5 |
python-3.11.0-he550d4f_1_cpython.conda |
Direct |
N/A |
❌ |
| CVE-2026-9669 |
Medium |
5.9 |
python-3.11.0-he550d4f_1_cpython.conda |
Direct |
python - 3.14.6,python - 3.13.14,https://github.com/python/cpython.git - v3.13.14,https://github.com/python/cpython.git - v3.14.6 |
❌ |
| CVE-2026-15806 |
Medium |
5.3 |
python-3.11.0-he550d4f_1_cpython.conda |
Direct |
N/A |
❌ |
| CVE-2026-1502 |
Medium |
4.5 |
python-3.11.0-he550d4f_1_cpython.conda |
Direct |
N/A |
❌ |
| CVE-2026-0864 |
Medium |
4.2 |
python-3.11.0-he550d4f_1_cpython.conda |
Direct |
N/A |
❌ |
| CVE-2026-4360 |
 Low |
2.4 |
python-3.11.0-he550d4f_1_cpython.conda |
Direct |
N/A |
❌ |
| CVE-2026-6879 |
Low |
2.0 |
python-3.11.0-he550d4f_1_cpython.conda |
Direct |
N/A |
❌ |
**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation
Details
CVE-2026-15308
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
- ❌ python-3.11.0-he550d4f_1_cpython.conda (Vulnerable Library)
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
The incremental HTML parser (html.parser.HTMLParser) allows for CPU
denial-of-service through repeated unterminated markup declarations when
processing uncontrolled data.
Publish Date: 2026-07-09
URL: CVE-2026-15308
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Step up your Open Source Security Game with Mend here
CVE-2026-11972
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
- ❌ python-3.11.0-he550d4f_1_cpython.conda (Vulnerable Library)
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
When using the "tarfile" module with a file opened in "streaming mode" (mode="r|") the tarfile module did not properly handle EOF, making archive parsing take exponentially longer.
Publish Date: 2026-06-23
URL: CVE-2026-11972
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Step up your Open Source Security Game with Mend here
CVE-2026-12003
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
- ❌ python-3.11.0-he550d4f_1_cpython.conda (Vulnerable Library)
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
To allow builds of Python to be run from an in-tree layout (rather than
an installed file layout), the VPATH variable is defined at build time
and used to locate certain landmarks - specifically,
Modules/setup.local. When this landmark is found relative to VPATH
relative to the executable, Python assumes it is running in a source
tree and generates a different default sys.path. This code remains in
release builds, so that release-ready builds can be built in-tree.
On Windows, since builds are written to 'PCbuild/', the value of
VPATH is set to '....', which results in a landmark of
'....\Modules\setup.local'. This path is outside the install directory
of Python, and may have different permissions, potentially allowing a
low-privilege user to create the landmark and an alternative "Lib"
folder that will be discovered by an otherwise restricted install.
Such a setup occurs with the legacy default install location for all
users (in the now superseded EXE installer), due to how Windows allows
all users to create folders in the root directory of their OS drive.
Our recommended mitigation on Windows is to migrate away from the
legacy installer and use the new "Python install
manager" (https://www.python.org/downloads/latest/pymanager/) to install
for the current user. Installs where the directory two levels above the
Python installation directory have equivalent permissions are unaffected
(in general, a per-user install cannot be modified at all by other
users, removing any escalation of privilege risk, and could be directly
modified by a privileged user, making the potential tampering
irrelevant). Alternative mitigations might include preemptively creating
and restricting access to a "Modules" directory. Be aware that only 3.13
and 3.14 will receive updated legacy installers - earlier fixes are only
provided as sources.
Platforms other than Windows allow VPATH to be overridden, but as they
don't usually use a separated directory in the build for binaries, are
unlikely to have a landmark reference outside of the install directory.
The landmark detection involving VPATH is a fallback for when a more
specific landmark - .\pybuilddir.txt - is absent, and was included for
compatibility. Future releases of Python will no longer include the
fallback, and so builds will need to generate or preserve the
pybuilddir.txt file in order to work in-tree. This landmark file has
been generated on Windows since 3.11, and on other platforms for longer.
Mend Note: The description of this vulnerability differs from MITRE.
Publish Date: 2026-06-16
URL: CVE-2026-12003
CVSS 3 Score Details (6.6)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Local
- Attack Complexity: Low
- Privileges Required: Low
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-06-16
Fix Resolution: python - 3.13.14,python - 3.14.6,https://github.com/python/cpython.git - v3.12.11,https://github.com/python/cpython.git - v3.13.4,https://github.com/python/cpython.git - v3.7.13,https://github.com/python/cpython.git - v3.9.23,https://github.com/python/cpython.git - v3.14.6,https://github.com/python/cpython.git - v3.8.19,https://github.com/python/cpython.git - v3.10.18,https://github.com/python/cpython.git - v3.11.13
Step up your Open Source Security Game with Mend here
CVE-2026-17084
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
- ❌ python-3.11.0-he550d4f_1_cpython.conda (Vulnerable Library)
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
The "stringprep" module didn't process characters from RFC 3454 tables
B.2 or B.3 correctly: the latest Unicode codepoint attributes were used
instead of the specified Unicode 3.2.0. This behavior would cause
mismatches when processing domain names using IDNA 2003 (the "idna"
codec) and the in_table_b2() function of the "stringprep" module. This
only affects domain names containing characters that were not previously
registered or had their Unicode attributes such as case-folding
behavior updated since Unicode 3.2.0.
Publish Date: 2026-08-18
URL: CVE-2026-17084
CVSS 3 Score Details (6.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Step up your Open Source Security Game with Mend here
CVE-2026-9669
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
- ❌ python-3.11.0-he550d4f_1_cpython.conda (Vulnerable Library)
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
bz2.BZ2Decompressor objects could be reused after a decompression error. If an application caught the resulting OSError and retried with the same decompressor, crafted input could cause the decompressor to resume from an invalid internal state and perform out-of-bounds writes to a stack buffer. This could crash the process when processing untrusted data.
Publish Date: 2026-06-08
URL: CVE-2026-9669
CVSS 3 Score Details (5.9)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Release Date: 2026-06-08
Fix Resolution: python - 3.14.6,python - 3.13.14,https://github.com/python/cpython.git - v3.13.14,https://github.com/python/cpython.git - v3.14.6
Step up your Open Source Security Game with Mend here
CVE-2026-15806
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
- ❌ python-3.11.0-he550d4f_1_cpython.conda (Vulnerable Library)
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
The HTTPPasswordMgr class in the urllib.request module, along with its subclasses HTTPPasswordMgrWithDefaultRealm and HTTPPasswordMgrWithPriorAuth, did not take the URL scheme into account when matching stored credentials against a requested URL. Credentials added for an https:// URL were also used for requests to the same host over http://, so an attacker able to redirect or downgrade a client to plain HTTP (for example, via an HTTPS-to-HTTP redirect or an on-path position) could capture credentials in cleartext. Credentials added for http:// URLs could likewise be sent over https://.
Credential matching is now scoped by URL scheme. Credentials registered with a URL that includes a scheme are only used for requests with the same scheme. Credentials registered with a bare authority (such as example.com or example.com:8080) continue to match any scheme, preserving compatibility with existing code, including proxy authentication.
Users who cannot upgrade immediately can mitigate by ensuring that applications never make plain http:// requests to hosts for which credentials are registered, for example by not following redirects to http:// URLs.
Publish Date: 2026-08-18
URL: CVE-2026-15806
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: None
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: High
- Integrity Impact: None
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Step up your Open Source Security Game with Mend here
CVE-2026-1502
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
- ❌ python-3.11.0-he550d4f_1_cpython.conda (Vulnerable Library)
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
Publish Date: 2026-04-10
URL: CVE-2026-1502
CVSS 3 Score Details (4.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: High
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Step up your Open Source Security Game with Mend here
CVE-2026-0864
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
- ❌ python-3.11.0-he550d4f_1_cpython.conda (Vulnerable Library)
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
When using the "configparser" module to write configuration files
containing multi-line text values with carriage return characters (\r) the
resulting file could be injected with unexpected keys and values if the
attacker controls the written value.
Publish Date: 2026-06-23
URL: CVE-2026-0864
CVSS 3 Score Details (4.2)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Local
- Attack Complexity: Low
- Privileges Required: High
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Step up your Open Source Security Game with Mend here
CVE-2026-4360
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
- ❌ python-3.11.0-he550d4f_1_cpython.conda (Vulnerable Library)
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.
Publish Date: 2026-06-30
URL: CVE-2026-4360
CVSS 3 Score Details (2.4)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: High
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: Low
- Availability Impact: None
For more information on CVSS3 Scores, click here.
Step up your Open Source Security Game with Mend here
CVE-2026-6879
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
- ❌ python-3.11.0-he550d4f_1_cpython.conda (Vulnerable Library)
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
"Element.findall()" and fully-consumed "Element.iterfind()" exhibit "O(n^2)" time complexity when using XPath index predicates (e.g. "[1]", "[last()]", "[last()-N]") on XML documents with many same-tag siblings. "Element.find()" is only affected when the first match is near the end of the sibling list, such as with "[last()]" or "[last()-N]"; ".//item[1]" short-circuits after the first match.
Publish Date: 2026-07-28
URL: CVE-2026-6879
CVSS 3 Score Details (2.0)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: High
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: Low
For more information on CVSS3 Scores, click here.
Step up your Open Source Security Game with Mend here
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Vulnerabilities
**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation
Details
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
The incremental HTML parser (html.parser.HTMLParser) allows for CPU
denial-of-service through repeated unterminated markup declarations when
processing uncontrolled data.
Publish Date: 2026-07-09
URL: CVE-2026-15308
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.Step up your Open Source Security Game with Mend here
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
When using the "tarfile" module with a file opened in "streaming mode" (mode="r|") the tarfile module did not properly handle EOF, making archive parsing take exponentially longer.
Publish Date: 2026-06-23
URL: CVE-2026-11972
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.Step up your Open Source Security Game with Mend here
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
To allow builds of Python to be run from an in-tree layout (rather than
an installed file layout), the VPATH variable is defined at build time
and used to locate certain landmarks - specifically,
Modules/setup.local. When this landmark is found relative to VPATH
relative to the executable, Python assumes it is running in a source
tree and generates a different default sys.path. This code remains in
release builds, so that release-ready builds can be built in-tree.
On Windows, since builds are written to 'PCbuild/', the value of
VPATH is set to '....', which results in a landmark of
'....\Modules\setup.local'. This path is outside the install directory
of Python, and may have different permissions, potentially allowing a
low-privilege user to create the landmark and an alternative "Lib"
folder that will be discovered by an otherwise restricted install.
Such a setup occurs with the legacy default install location for all
users (in the now superseded EXE installer), due to how Windows allows
all users to create folders in the root directory of their OS drive.
Our recommended mitigation on Windows is to migrate away from the
legacy installer and use the new "Python install
manager" (https://www.python.org/downloads/latest/pymanager/) to install
for the current user. Installs where the directory two levels above the
Python installation directory have equivalent permissions are unaffected
(in general, a per-user install cannot be modified at all by other
users, removing any escalation of privilege risk, and could be directly
modified by a privileged user, making the potential tampering
irrelevant). Alternative mitigations might include preemptively creating
and restricting access to a "Modules" directory. Be aware that only 3.13
and 3.14 will receive updated legacy installers - earlier fixes are only
provided as sources.
Platforms other than Windows allow VPATH to be overridden, but as they
don't usually use a separated directory in the build for binaries, are
unlikely to have a landmark reference outside of the install directory.
The landmark detection involving VPATH is a fallback for when a more
specific landmark - .\pybuilddir.txt - is absent, and was included for
compatibility. Future releases of Python will no longer include the
fallback, and so builds will need to generate or preserve the
pybuilddir.txt file in order to work in-tree. This landmark file has
been generated on Windows since 3.11, and on other platforms for longer.
Mend Note: The description of this vulnerability differs from MITRE.
Publish Date: 2026-06-16
URL: CVE-2026-12003
CVSS 3 Score Details (6.6)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Local
- Attack Complexity: Low
- Privileges Required: Low
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-06-16
Fix Resolution: python - 3.13.14,python - 3.14.6,https://github.com/python/cpython.git - v3.12.11,https://github.com/python/cpython.git - v3.13.4,https://github.com/python/cpython.git - v3.7.13,https://github.com/python/cpython.git - v3.9.23,https://github.com/python/cpython.git - v3.14.6,https://github.com/python/cpython.git - v3.8.19,https://github.com/python/cpython.git - v3.10.18,https://github.com/python/cpython.git - v3.11.13
Step up your Open Source Security Game with Mend here
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
The "stringprep" module didn't process characters from RFC 3454 tables
B.2 or B.3 correctly: the latest Unicode codepoint attributes were used
instead of the specified Unicode 3.2.0. This behavior would cause
mismatches when processing domain names using IDNA 2003 (the "idna"
codec) and the in_table_b2() function of the "stringprep" module. This
only affects domain names containing characters that were not previously
registered or had their Unicode attributes such as case-folding
behavior updated since Unicode 3.2.0.
Publish Date: 2026-08-18
URL: CVE-2026-17084
CVSS 3 Score Details (6.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.Step up your Open Source Security Game with Mend here
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
bz2.BZ2Decompressor objects could be reused after a decompression error. If an application caught the resulting OSError and retried with the same decompressor, crafted input could cause the decompressor to resume from an invalid internal state and perform out-of-bounds writes to a stack buffer. This could crash the process when processing untrusted data.
Publish Date: 2026-06-08
URL: CVE-2026-9669
CVSS 3 Score Details (5.9)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Release Date: 2026-06-08
Fix Resolution: python - 3.14.6,python - 3.13.14,https://github.com/python/cpython.git - v3.13.14,https://github.com/python/cpython.git - v3.14.6
Step up your Open Source Security Game with Mend here
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
The HTTPPasswordMgr class in the urllib.request module, along with its subclasses HTTPPasswordMgrWithDefaultRealm and HTTPPasswordMgrWithPriorAuth, did not take the URL scheme into account when matching stored credentials against a requested URL. Credentials added for an https:// URL were also used for requests to the same host over http://, so an attacker able to redirect or downgrade a client to plain HTTP (for example, via an HTTPS-to-HTTP redirect or an on-path position) could capture credentials in cleartext. Credentials added for http:// URLs could likewise be sent over https://.
Credential matching is now scoped by URL scheme. Credentials registered with a URL that includes a scheme are only used for requests with the same scheme. Credentials registered with a bare authority (such as example.com or example.com:8080) continue to match any scheme, preserving compatibility with existing code, including proxy authentication.
Users who cannot upgrade immediately can mitigate by ensuring that applications never make plain http:// requests to hosts for which credentials are registered, for example by not following redirects to http:// URLs.
Publish Date: 2026-08-18
URL: CVE-2026-15806
CVSS 3 Score Details (5.3)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: None
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: High
- Integrity Impact: None
- Availability Impact: None
For more information on CVSS3 Scores, click here.Step up your Open Source Security Game with Mend here
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
Publish Date: 2026-04-10
URL: CVE-2026-1502
CVSS 3 Score Details (4.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: High
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.Step up your Open Source Security Game with Mend here
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
When using the "configparser" module to write configuration files
containing multi-line text values with carriage return characters (\r) the
resulting file could be injected with unexpected keys and values if the
attacker controls the written value.
Publish Date: 2026-06-23
URL: CVE-2026-0864
CVSS 3 Score Details (4.2)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Local
- Attack Complexity: Low
- Privileges Required: High
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: High
- Availability Impact: None
For more information on CVSS3 Scores, click here.Step up your Open Source Security Game with Mend here
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.
Publish Date: 2026-06-30
URL: CVE-2026-4360
CVSS 3 Score Details (2.4)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: High
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: Low
- Availability Impact: None
For more information on CVSS3 Scores, click here.Step up your Open Source Security Game with Mend here
Vulnerable Library - python-3.11.0-he550d4f_1_cpython.conda
General purpose programming language
Library home page: https://api.anaconda.org/download/conda-forge/python/3.11.0/linux-64/python-3.11.0-he550d4f_1_cpython.conda
Sample Path to Dependency File: /environment.yml
Path to vulnerable library: /home/wss-scanner/miniconda3/pkgs/python-3.11.0-he550d4f_1_cpython.conda
Dependency Hierarchy:
Found in HEAD commit: 87a13d860d4a829b6ba08600703e5d866e1b44d4
Found in base branch: main
Vulnerability Details
"Element.findall()" and fully-consumed "Element.iterfind()" exhibit "O(n^2)" time complexity when using XPath index predicates (e.g. "[1]", "[last()]", "[last()-N]") on XML documents with many same-tag siblings. "Element.find()" is only affected when the first match is near the end of the sibling list, such as with "[last()]" or "[last()-N]"; ".//item[1]" short-circuits after the first match.
Publish Date: 2026-07-28
URL: CVE-2026-6879
CVSS 3 Score Details (2.0)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: High
- User Interaction: Required
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: Low
For more information on CVSS3 Scores, click here.Step up your Open Source Security Game with Mend here