RCE in Mesa
CVE-2026-29075
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.005 (43.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.002
Affected products
- Mesa — versions <= 3.5.0
- Mesa Project
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/mesa/mesa/security/advisories/GHSA-3j55-5q6x-2h48 (Mitigation, Vendor Advisory)
- github.com/mesa/mesa/commit/c35b8cd67fc89dd680ae218e49b77f6e1ee07a27 (Patch)
Frequently asked questions
- What is CVE-2026-29075?
- CVE-2026-29075 is a high-severity vulnerability in Mesa, classified under Code Injection. CVSS score: 8.3/10. Published 2026-03-06.
- How severe is CVE-2026-29075?
- High severity. CVSS v3 base score is 8.3 out of 10.
- Is CVE-2026-29075 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.