{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "26.5.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3987c86ccd5527177e96b48bd4dc1777dd2c9baa"
            },
            {
              "fixed": "90559068eeea050c706ceea7fdefadd6ea6a1ebc"
            }
          ],
          "repo": "https://github.com/conda/conda",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9m8m-c4j3-rj2c"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22",
      "CWE-73"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53940.json"
  },
  "details": "Conda is a system-level binary package and environment manager that runs on major operating systems and platforms. Prior to 26.5.2, parse_entry_point_def in conda/common/path/python.py accepted an unvalidated entry-point command from a noarch:python package's info/link.json metadata. CreatePythonEntryPointAction in conda/core/path_actions.py interpolated that command into target_short_path, and PrefixPathAction.target_full_path joined it to the installation prefix without verifying that the result remained under the intended bin or Scripts directory. create_python_entry_point in conda/gateways/disk/create.py then wrote an executable wrapper to the resulting path. A malicious package could use path separators, traversal segments, or an absolute command path to write outside the prefix or overwrite another in-prefix entry point during default install and environment transactions. Out-of-prefix writes require the target parent directory to exist, while an overwritten entry point can execute attacker-controlled Python when later invoked with the installing user's privileges. This issue is fixed in version 26.5.2.",
  "id": "CVE-2026-53940",
  "modified": "2026-09-23T03:30:54.702262309Z",
  "published": "2026-09-21T15:35:37.770Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/conda/conda/releases/tag/26.5.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53940.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/conda/conda/security/advisories/GHSA-9m8m-c4j3-rj2c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53940"
    },
    {
      "type": "FIX",
      "url": "https://github.com/conda/conda/commit/3987c86ccd5527177e96b48bd4dc1777dd2c9baa"
    },
    {
      "type": "FIX",
      "url": "https://github.com/conda/conda/pull/16168"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Conda: Entry-point path traversal in noarch:python install (arbitrary file write) — canonical Python implementation"
}