Vulnerability Report

CVE-2026-29075

RCE

Title: Untrusted code checkout in workflow leads to RCE

RCE

Proof Of Concept

PoC Available for CVE-2026-29075

CWE Category CWE-94
Published Date Mar 06, 2026
Modified Date Mar 11, 2026
Exploit Status Available
Score 8.3 CVSS v3.1
Exploit Probability (EPSS)
0.52%

Vulnerability Summary

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.

Impacted Vendors

B
brian_paul 1
M
mesa_project 1

Reference Links

https://github.com/mesa/mesa/commit/c35b8cd67fc89dd680ae218e49b77f6e1ee07a27 https://github.com/mesa/mesa/security/advisories/GHSA-3j55-5q6x-2h48
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.3
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
9.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-29075 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/pvharmo2/gha-lab-ca4fa82ac5
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

Affected Stack

No specific products linked.