CVE-2026-29075 json
Mesa: Checking out of untrusted code in `benchmarks.yml` workflow may lead to code execution in privileged runner
published 8mo ago modified 4mo ago also EUVD-2026-10045
- cvss
- 8.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- github.com/mesa/mesa@c35b8cd commit
Is CVE-2026-29075 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 8mo ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- mesa mesa
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
-
github.com
/mesa/mesa/commit/c35b8cd67fc89dd680ae218e49b77f6e1ee07a27
patch
-
github.com
/mesa/mesa/security/advisories/GHSA-3j55-5q6x-2h48
mitigation, vendor-advisory
Sources
- CVE List CVE-2026-29075
- NVD CVE-2026-29075
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.