Upgrade embedded Python patch version to 3.13.15

[Kyle-Neale]

What does this PR do?

Upgrades the Agent's embedded CPython interpreter from 3.13.14 to 3.13.15 (patch version update).

• Updated omnibus/config/software/python3.rb with the new version
• Updated deps/cpython/cpython.MODULE.bazel with the new version and SHA256
• Updated test/new-e2e/tests/agent-platform/common/agent_behaviour.go with the expected version
• Created a release note documenting the upgrade

SHA256 hash automatically fetched and verified against the official Python.org SBOM file. See the official Python release page for details.

Motivation

Keep the embedded Python up to date with bug fixes and security patches. 3.13.15 (released 2026-08-05) remediates several CVEs tracked in the agent-integrations VULN queue, including tarfile symlink/hardlink filter issues (CVE-2026-11940, CVE-2026-4360), a tarfile DoS (CVE-2026-11972), an html.parser quadratic DoS (CVE-2026-15308), a configparser CR write injection (CVE-2026-0864), and an xml.etree findall DoS (CVE-2026-6879).

Describe how you validated your changes

CI is considered enough to validate changes. The E2E ExpectedPythonVersion3 constant is updated in lockstep so the agent-platform behaviour tests assert the new version.

Additional Notes

Generated with dda inv python-version.update, mirroring the previous automated bump (#52085).

[dd-octo-sts]

Files inventory check summary

File checks results against ancestor a055712c:

Results for datadog-agent_7.84.0~devel.git.88.40ead85.pipeline.130211180-1_amd64.deb:

Detected file changes:

5 Changed files:

• opt/datadog-agent/embedded/lib/python3.13/imaplib.py:
  • Size changed: +10.18% (5.41 KiB) (53.09 KiB -> 58.5 KiB)
• opt/datadog-agent/embedded/lib/python3.13/idlelib/run.py:
  • Size changed: +12.11% (2.59 KiB) (21.36 KiB -> 23.95 KiB)
• opt/datadog-agent/embedded/lib/python3.13/curses/textpad.py:
  • Size changed: +20.09% (1.53 KiB) (7.59 KiB -> 9.12 KiB)
• opt/datadog-agent/embedded/lib/python3.13/tkinter/dialog.py:
  • Size changed: +13.03% (200.0 B) (1.5 KiB -> 1.69 KiB)
• opt/datadog-agent/embedded/lib/python3.13/idlelib/util.py:
  • Size changed: +98.70% (1.26 KiB) (1.28 KiB -> 2.55 KiB)

Results for datadog-iot-agent_7.84.0~devel.git.88.40ead85.pipeline.130211180-1_amd64.deb:

No change detected

[cit-pr-commenter-54b7da]

Regression Detector

Regression Detector Results

Metrics dashboard
Target profiles
Run ID: 889deedc-1eca-42ff-b79a-954cc9b7f986

Baseline: f78d0c6
Comparison: 40ead85
Diff

Optimization Goals: ✅ No significant changes detected

Fine details of change detection per experiment

perf	experiment	goal	Δ mean %	Δ mean % CI	trials	links
➖	quality_gate_private_action_runner	memory utilization	+0.36	[+0.24, +0.49]	1	Logs bounds checks dashboard
➖	quality_gate_metrics_logs	memory utilization	+0.19	[-0.06, +0.43]	1	Logs bounds checks dashboard
➖	quality_gate_idle	memory utilization	+0.14	[+0.10, +0.19]	1	Logs bounds checks dashboard
➖	quality_gate_security_mean_fs_load	memory utilization	+0.08	[+0.04, +0.11]	1	Logs bounds checks dashboard
➖	quality_gate_idle_all_features	memory utilization	+0.05	[+0.01, +0.09]	1	Logs bounds checks dashboard
➖	quality_gate_security_no_fs_load	memory utilization	-0.04	[-0.14, +0.05]	1	Logs bounds checks dashboard
➖	quality_gate_security_idle	memory utilization	-0.50	[-0.55, -0.44]	1	Logs bounds checks dashboard
➖	quality_gate_logs	% cpu utilization	-0.99	[-1.83, -0.14]	1	Logs bounds checks dashboard

Bounds Checks: ✅ Passed

perf	experiment	bounds_check_name	replicates_passed	observed_value	links
✅	quality_gate_idle	intake_connections	10/10	3 ≤ 4	bounds checks dashboard
✅	quality_gate_idle	memory_usage	10/10	147.73MiB ≤ 154MiB	bounds checks dashboard
✅	quality_gate_idle	total_bytes_received	10/10	731.80KiB ≤ 819.20KiB	bounds checks dashboard
✅	quality_gate_idle_all_features	intake_connections	10/10	3 ≤ 4	bounds checks dashboard
✅	quality_gate_idle_all_features	memory_usage	10/10	492.84MiB ≤ 512MiB	bounds checks dashboard
✅	quality_gate_idle_all_features	total_bytes_received	10/10	1.13MiB ≤ 1.25MiB	bounds checks dashboard
✅	quality_gate_logs	intake_connections	10/10	19 ≤ 40	bounds checks dashboard
✅	quality_gate_logs	memory_usage	10/10	189.97MiB ≤ 195MiB	bounds checks dashboard
✅	quality_gate_logs	missed_bytes	10/10	0B = 0B	bounds checks dashboard
✅	quality_gate_logs	total_bytes_received	10/10	264.18MiB ≤ 292MiB	bounds checks dashboard
✅	quality_gate_metrics_logs	cpu_usage	10/10	372.28 ≤ 2000	bounds checks dashboard
✅	quality_gate_metrics_logs	intake_connections	10/10	20 ≤ 40	bounds checks dashboard
✅	quality_gate_metrics_logs	memory_usage	10/10	383.81MiB ≤ 430MiB	bounds checks dashboard
✅	quality_gate_metrics_logs	missed_bytes	10/10	0B = 0B	bounds checks dashboard
✅	quality_gate_metrics_logs	total_bytes_received	10/10	0.94GiB ≤ 1.04GiB	bounds checks dashboard
✅	quality_gate_private_action_runner	memory_usage	10/10	72.59MiB ≤ 75MiB	bounds checks dashboard
✅	quality_gate_security_idle	cpu_usage	10/10	25.89 ≤ 100	bounds checks dashboard
✅	quality_gate_security_idle	memory_usage	10/10	299.15MiB ≤ 330MiB	bounds checks dashboard
✅	quality_gate_security_mean_fs_load	cpu_usage	10/10	61.25 ≤ 200	bounds checks dashboard
✅	quality_gate_security_mean_fs_load	memory_usage	10/10	278.91MiB ≤ 310MiB	bounds checks dashboard
✅	quality_gate_security_no_fs_load	cpu_usage	10/10	21.27 ≤ 100	bounds checks dashboard
✅	quality_gate_security_no_fs_load	memory_usage	10/10	290.19MiB ≤ 320MiB	bounds checks dashboard

Explanation

Confidence level: 90.00%
Effect size tolerance: |Δ mean %| ≥ 5.00%

Performance changes are noted in the perf column of each table:

• ✅ = significantly better comparison variant performance
• ❌ = significantly worse comparison variant performance
• ➖ = no significant change in performance

A regression test is an A/B test of target performance in a repeatable rig, where "performance" is measured as "comparison variant minus baseline variant" for an optimization goal (e.g., ingress throughput). Due to intrinsic variability in measuring that goal, we can only estimate its mean value for each experiment; we report uncertainty in that value as a 90.00% confidence interval denoted "Δ mean % CI".

For each experiment, we decide whether a change in performance is a "regression" -- a change worth investigating further -- if all of the following criteria are true:

1. Its estimated |Δ mean %| ≥ 5.00%, indicating the change is big enough to merit a closer look.

2. Its 90.00% confidence interval "Δ mean % CI" does not contain zero, indicating that if our statistical model is accurate, there is at least a 90.00% chance there is a difference in performance between baseline and comparison variants.

3. Its configuration does not mark it "erratic".

Replicate Execution Details

We run multiple replicates for each experiment/variant. However, we allow replicates to be automatically retried if there are any failures, up to 8 times, at which point the replicate is marked dead and we are unable to run analysis for the entire experiment. We call each of these attempts at running replicates a replicate execution. This section lists all replicate executions that failed due to the target crashing or being oom killed.

Note: In the below tables we bucket failures by experiment, variant, and failure type. For each of these buckets we list out the replicate indexes that failed with an annotation signifying how many times said replicate failed with the given failure mode. In the below example the baseline variant of the experiment named experiment_with_failures had two replicates that failed by oom kills. Replicate 0, which failed 8 executions, and replicate 1 which failed 6 executions, all with the same failure mode.

Experiment	Variant	Replicates	Failure	Logs	Debug Dashboard
experiment_with_failures	baseline	0 (x8) 1 (x6)	Oom killed		Debug Dashboard

The debug dashboard links will take you to a debugging dashboard specifically designed to investigate replicate execution failures.

❌ Retried Profiling Replicate Execution Failures (ddprof)

Note: Profiling replicas may still be executing. See the debug dashboard for up to date status.

Experiment	Variant	Replicates	Failure	Debug Dashboard
quality_gate_metrics_logs	baseline	10	Oom killed	Debug Dashboard
quality_gate_metrics_logs	comparison	10	Oom killed	Debug Dashboard

CI Pass/Fail Decision

✅ Passed. All Quality Gates passed.

• quality_gate_security_no_fs_load, bounds check memory_usage: 10/10 replicas passed. Gate passed.
• quality_gate_security_no_fs_load, bounds check cpu_usage: 10/10 replicas passed. Gate passed.
• quality_gate_metrics_logs, bounds check memory_usage: 10/10 replicas passed. Gate passed.
• quality_gate_metrics_logs, bounds check intake_connections: 10/10 replicas passed. Gate passed.
• quality_gate_metrics_logs, bounds check total_bytes_received: 10/10 replicas passed. Gate passed.
• quality_gate_metrics_logs, bounds check cpu_usage: 10/10 replicas passed. Gate passed.
• quality_gate_metrics_logs, bounds check missed_bytes: 10/10 replicas passed. Gate passed.
• quality_gate_idle_all_features, bounds check memory_usage: 10/10 replicas passed. Gate passed.
• quality_gate_idle_all_features, bounds check total_bytes_received: 10/10 replicas passed. Gate passed.
• quality_gate_idle_all_features, bounds check intake_connections: 10/10 replicas passed. Gate passed.
• quality_gate_idle, bounds check total_bytes_received: 10/10 replicas passed. Gate passed.
• quality_gate_idle, bounds check memory_usage: 10/10 replicas passed. Gate passed.
• quality_gate_idle, bounds check intake_connections: 10/10 replicas passed. Gate passed.
• quality_gate_security_idle, bounds check cpu_usage: 10/10 replicas passed. Gate passed.
• quality_gate_security_idle, bounds check memory_usage: 10/10 replicas passed. Gate passed.
• quality_gate_logs, bounds check total_bytes_received: 10/10 replicas passed. Gate passed.
• quality_gate_logs, bounds check memory_usage: 10/10 replicas passed. Gate passed.
• quality_gate_logs, bounds check intake_connections: 10/10 replicas passed. Gate passed.
• quality_gate_logs, bounds check missed_bytes: 10/10 replicas passed. Gate passed.
• quality_gate_security_mean_fs_load, bounds check cpu_usage: 10/10 replicas passed. Gate passed.
• quality_gate_security_mean_fs_load, bounds check memory_usage: 10/10 replicas passed. Gate passed.
• quality_gate_private_action_runner, bounds check memory_usage: 10/10 replicas passed. Gate passed.

[dd-octo-sts]

Static quality checks

✅ Please find below the results from static quality gates
Comparison made with ancestor a055712
📊 Static Quality Gates Dashboard
🔗 SQG Job

Successful checks

Info

	Quality gate	Change	Size (prev → curr → max)
✅	agent_deb_amd64	+51.17 KiB (0.01% increase, -1.02% of buffer)	759.542 → 759.592 → 764.430
✅	agent_deb_amd64_fips	+51.17 KiB (0.01% increase, -1.79% of buffer)	712.896 → 712.946 → 715.680
✅	agent_heroku_amd64	+51.17 KiB (0.02% increase, -0.74% of buffer)	312.272 → 312.322 → 318.990
✅	agent_msi	+43.4 KiB (0.01% increase, -0.24% of buffer)	643.218 → 643.260 → 660.900
✅	agent_rpm_amd64	+51.17 KiB (0.01% increase, -1.03% of buffer)	759.526 → 759.576 → 764.400
✅	agent_rpm_amd64_fips	+51.17 KiB (0.01% increase, -1.78% of buffer)	712.879 → 712.929 → 715.680
✅	agent_rpm_arm64	+55.18 KiB (0.01% increase, -5.47% of buffer)	735.504 → 735.558 → 736.490
✅	agent_rpm_arm64_fips	+55.14 KiB (0.01% increase, -3.53% of buffer)	692.113 → 692.167 → 693.640
✅	agent_suse_amd64	+51.17 KiB (0.01% increase, -1.03% of buffer)	759.526 → 759.576 → 764.400
✅	agent_suse_amd64_fips	+51.17 KiB (0.01% increase, -1.78% of buffer)	712.879 → 712.929 → 715.680
✅	agent_suse_arm64	+55.18 KiB (0.01% increase, -5.47% of buffer)	735.504 → 735.558 → 736.490
✅	agent_suse_arm64_fips	+55.14 KiB (0.01% increase, -3.53% of buffer)	692.113 → 692.167 → 693.640
✅	docker_agent_amd64	+51.57 KiB (0.01% increase, -2.79% of buffer)	818.166 → 818.216 → 819.970
✅	docker_agent_arm64	+55.58 KiB (0.01% increase, -3.59% of buffer)	819.180 → 819.234 → 820.690
✅	docker_agent_jmx_amd64	+51.57 KiB (0.00% increase, -3.02% of buffer)	1009.063 → 1009.114 → 1010.730
✅	docker_agent_jmx_arm64	+55.58 KiB (0.01% increase, -3.31% of buffer)	998.730 → 998.784 → 1000.370

17 successful checks with minimal change (< 2 KiB)

	Quality gate	Current Size
✅	docker_cluster_agent_amd64	210.346 MiB
✅	docker_cluster_agent_arm64	223.393 MiB
✅	docker_cws_instrumentation_amd64	7.439 MiB
✅	docker_cws_instrumentation_arm64	6.877 MiB
✅	docker_dogstatsd_amd64	39.474 MiB
✅	docker_dogstatsd_arm64	37.560 MiB
✅	docker_host_profiler_amd64	305.804 MiB
✅	docker_host_profiler_arm64	317.121 MiB
✅	dogstatsd_deb_amd64	30.216 MiB
✅	dogstatsd_deb_arm64	28.239 MiB
✅	dogstatsd_rpm_amd64	30.216 MiB
✅	dogstatsd_suse_amd64	30.216 MiB
✅	iot_agent_deb_amd64	46.420 MiB
✅	iot_agent_deb_arm64	43.095 MiB
✅	iot_agent_deb_armhf	43.875 MiB
✅	iot_agent_rpm_amd64	46.420 MiB
✅	iot_agent_suse_amd64	46.419 MiB

[aiuto]

Seems right. You have to update the aix script.

[aiuto]

I don't think you need either of
default_version or relative_path.

I made #54744 to try it.

If that passes CI, you can do the same here.
Or do nothing in this PR and we'll merge mine to kill it.

[Kyle-Neale]

Sounds good! If you're passes - we can just use it. Otherwise, I can continue.

[Kyle-Neale]

Follow-up: opened #54749 to bump the AIX embedded Python pin (packaging/aix/lib/env.sh) to 3.13.15. That file is not touched by dda inv python-version.update, so this bump left AIX on 3.13.14 — #54749 closes that gap so AIX ships 3.13.15 too. (Thanks @aiuto / Codex for catching it.)