CVE-2026-29075: Mesa is an open-source Python library for agent-based modeling, simulating complex systems and exploring emerg

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HIGH 8.3REMOTEUPGRADE

CVE-2026-29075 is a high-severity flaw (CVSS 8.3) affecting mesa. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Mesa is an open-source Python library for agent-based modeling, simulating complex systems and exploring emergent behaviors. In version 3.5.0 and prior, checking out of untrusted code in benchmarks.yml workflow may lead to code execution in privileged runner. This issue has been patched via commit c35b8cd.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-03-06
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: mesa project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-06 17:16 UTCPublished CVE record published
2026-06-17 10:29 UTCUpdated Record last modified

mesa project mesa UPGRADE

Affected: <= 3.5.0

Fixed in: newer than 3.5.0

Safe to downgrade to: no unaffected older release

1. Check installed version

pip show mesa

2. UPGRADE to newer than 3.5.0

pip install --upgrade "mesa>3.5.0"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-29075?

mesa: upgrade to newer than 3.5.0. Exact commands for each OS are on this page.

Is CVE-2026-29075 being exploited?

CVE-2026-29075 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-29075 affect?

CVE-2026-29075 affects mesa. Severity is high (CVSS 8.3). Mesa is an open-source Python library for agent-based modeling, simulating complex systems and exploring emergent behaviors. In version 3.5.0 and prior, checking out of untrusted code in benchmarks.yml workflow may lead to code execution in

How urgent is CVE-2026-29075?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

Related CVEs

CVE-2026-40393 HIGH 8.1 UPGRADE In Mesa before 25.3.6 and 26 before 26.0.1, out-of-bounds memory access can occur in WebGPU because the amount
CVE-2023-45931 HIGH 7.5 DOWNGRADE Mesa 23.0.4 was discovered to contain a NULL pointer dereference in check_xshm() for the has_error state
CVE-2023-45922 MEDIUM 4.3 DOWNGRADE glx_pbuffer.c in Mesa 23.0.4 was discovered to contain a segmentation violation when calling __glXGetDrawableA
CVE-2023-45919 MEDIUM 5.3 DOWNGRADE Mesa 23.0.4 was discovered to contain a buffer over-read in glXQueryServerString()
CVE-2023-45913 MEDIUM 6.2 DOWNGRADE Mesa v23.0.4 was discovered to contain a NULL pointer dereference via the function dri2GetGlxDrawableFromXDraw

References

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