{"id":"CVE-2026-53940","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-53940","generatedAt":"2026-10-28T04:35:24.987Z","title":"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…","description":"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.","published":"2026-09-21T16:17:09.000Z","lastModified":"2026-09-24T21:16:28.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-22","CWE-73"],"affected":[],"epss":{"score":0.00546,"percentile":0.45581,"date":"2026-10-27","history":[{"date":"2026-09-22","score":0.00424,"percentile":0.36344}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-21T16:17:09.000Z","detail":{"score":"8.8","severity":"HIGH","publishedAt":"2026-09-21T16:17:09.010Z"},"summary":"New CVE, high severity (CVSS 8.8)."}],"references":[{"url":"https://github.com/conda/conda/commit/3987c86ccd5527177e96b48bd4dc1777dd2c9baa","source":"security-advisories@github.com"},{"url":"https://github.com/conda/conda/pull/16168","source":"security-advisories@github.com"},{"url":"https://github.com/conda/conda/releases/tag/26.5.2","source":"security-advisories@github.com"},{"url":"https://github.com/conda/conda/security/advisories/GHSA-9m8m-c4j3-rj2c","source":"security-advisories@github.com"},{"url":"https://github.com/conda/conda/security/advisories/GHSA-9m8m-c4j3-rj2c","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53940","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}