Mesa: Checking out of untrusted code in `benchmarks.yml` workflow may lead to code execution in privileged runner

{
  "id": "3941e9364fd8ea8027b94b4076c590a2594137792e3964bd6b1480d29ac05bdd",
  "url": "https://osv.dev/vulnerability/CVE-2026-29075",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Mesa: Checking out of untrusted code in `benchmarks.yml` workflow may lead to code execution in privileged runner",
    "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.",
    "evidence": "osv:CVE-2026-29075",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-29075",
      "aliases": [
        "CVE-2026-29075",
        "GHSA-3j55-5q6x-2h48"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mesa/mesa",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "c35b8cd67fc89dd680ae218e49b77f6e1ee07a27"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mesa_project:mesa:*:*:*:*:*:python:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "3.5.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c35b8cd67fc89dd680ae218e49b77f6e1ee07a27"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.5.0",
            "v3.5.0b0",
            "v3.4.1",
            "v3.4.0",
            "v3.3.0",
            "v3.2.0",
            "v3.1.4",
            "v3.1.3",
            "v3.1.2",
            "v3.1.1",
            "v3.1.0",
            "v3.0.1",
            "v3.0.0",
            "v3.0.0rc0",
            "v3.0.0b2",
            "v3.0.0b1",
            "v3.0.0b0",
            "v3.0.0a5",
            "v3.0.0a4",
            "v3.0.0a3",
            "v3.0.0a2",
            "v3.0.0a1",
            "v3.0.0a0",
            "v2.3.0",
            "v2.3.0-rc1",
            "v2.2.5",
            "v2.2.1",
            "v2.2.0",
            "v2.1.5",
            "v2.1.4",
            "v2.1.3",
            "v2.1.2",
            "v2.1.1",
            "v2.1.0",
            "v2.0.1",
            "v2.0.0",
            "v1.2.1",
            "v1.2.0",
            "v1.1.0",
            "v1.0.0",
            "v0.9.0",
            "v0.8.9",
            "v0.8.7",
            "v0.8.6",
            "v0.8.5",
            "v0.8.4",
            "v0.8.3",
            "v0.8.2",
            "v0.8.1",
            "v0.8.0",
            "v0.7.8.1",
            "v0.7.8",
            "v0.7.6",
            "v0.6.6",
            "v0.6.5.1",
            "v0.6.5",
            "v0.6.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-29075.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.439493165Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29075.json",
        "https://github.com/mesa/mesa/security/advisories/GHSA-3j55-5q6x-2h48",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-29075",
        "https://github.com/mesa/mesa/commit/c35b8cd67fc89dd680ae218e49b77f6e1ee07a27"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-94"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29075.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-29075",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499418,
  "published_at": "2026-03-06T16:30:08.146+00:00"
}