Skip to content

x/vulndb: potential Go vuln in github.com/mattermost/mattermost-server: GHSA-9r42-rhw3-2222 #4325

New issue
New issue
Open
Open
x/vulndb: potential Go vuln in github.com/mattermost/mattermost-server: GHSA-9r42-rhw3-2222#4325
Labels
NeedsTriage
@GoVulnBot

Description

@GoVulnBot
GoVulnBot
opened on Jan 16, 2026

Advisory GHSA-9r42-rhw3-2222 references a vulnerability in the following Go modules:

Module
github.com/mattermost/mattermost-server

Description:
Mattermost versions 10.11.x <= 10.11.8 fail to validate input size before processing hashtags which allows an authenticated attacker to exhaust CPU resources via a single HTTP request containing a post with thousands space-separated tokens.

References:

Cross references:

See doc/quickstart.md for instructions on how to triage this report.

id: GO-ID-PENDING
modules:
    - module: github.com/mattermost/mattermost-server
      versions:
        - fixed: 11.2.0+incompatible
      non_go_versions:
        - introduced: TODO (earliest fixed "10.11.9", vuln range ">= 10.11.0, <= 10.11.8")
        - fixed: 8.0.0-20251201064648-4d86263f5430
        - introduced: 11.0.0
      vulnerable_at: 11.2.0-rc3+incompatible
summary: Mattermost is vulnerable to CPU exhaustion via crafted HTTP request in github.com/mattermost/mattermost-server
cves:
    - CVE-2025-14822
ghsas:
    - GHSA-9r42-rhw3-2222
references:
    - advisory: https://github.com/advisories/GHSA-9r42-rhw3-2222
    - advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-14822
    - fix: https://github.com/mattermost/mattermost/commit/4d86263f5430d0eb991fc52ec886cf778cb072e6
    - fix: https://github.com/mattermost/mattermost/commit/b3d6c0c564c1a79e54e5105d0a8b60fc58a2bdee
    - web: https://mattermost.com/security-updates
notes:
    - fix: 'module merge error: could not merge versions of module github.com/mattermost/mattermost-server: invalid or non-canonical semver version (found TODO (earliest fixed "10.11.9", vuln range ">= 10.11.0, <= 10.11.8"))'
source:
    id: GHSA-9r42-rhw3-2222
    created: 2026-01-16T21:01:44.559807483Z
review_status: UNREVIEWED

Metadata

Metadata

Assignees

No one assigned

    Labels

    NeedsTriage

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions