{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "1.5.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "99261e1355c89a316bf0824bb03f855c6aadae8f"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e5c37bb0a54950b552df33546c47510fffa0752b"
            },
            {
              "fixed": "99261e1355c89a316bf0824bb03f855c6aadae8f"
            }
          ],
          "repo": "https://github.com/aeon-toolkit/aeon",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-mhg2-mc45-wrjr"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-94"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65820.json"
  },
  "details": "aeon is a scikit-learn compatible Python library for learning from time series. Prior to version 1.5.0, a GitHub Actions workflow used pull_request_target for pre-commit checks on pull requests from forks. In this configuration, fork-controlled code could be checked out and executed in a privileged context. The vulnerable workflow also generated/used elevated credentials and could automatically commit or push fixes back to pull request branches. This created a potential token exposure and repository write path if an attacker submitted a malicious fork pull request designed to execute during the privileged workflow run. This issue has been patched in version 1.5.0.",
  "id": "CVE-2026-65820",
  "modified": "2026-11-12T02:30:58.206777029Z",
  "published": "2026-11-11T17:48:51.628Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65820.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/aeon-toolkit/aeon/commit/99261e1355c89a316bf0824bb03f855c6aadae8f"
    },
    {
      "type": "FIX",
      "url": "https://github.com/aeon-toolkit/aeon/pull/3394"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/aeon-toolkit/aeon/security/advisories/GHSA-mhg2-mc45-wrjr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-65820"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "aeon: Privileged GitHub Actions workflow allowed fork-controlled code execution"
}