CVE-2026-29075
Mesa: Checking out of untrusted code in benchmarks.yml workflow may lead to code execution in privileged runner
- Published
- Mar 6, 2026
- Updated
- Mar 9, 2026
- Assigning CNA
- GitHub_M
- Evidence observed
- Sep 5, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 30.7%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
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.
Sources
1- gha-lab-ca4fa82ac5Research
Security-research lab: reproduction of CVE-2026-29075 (GHSA-3j55-5q6x-2h48) in mesa/mesa benchmarks.yml pull_request_target workflow — single-commit snapshot for authorized vulnerability reproduction.
Responsible use
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