{"id":"CVE-2026-112939","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-112939","generatedAt":"2026-10-27T23:56:32.836Z","title":"From 3.22.0 until 4.2.1, SoftFileLock can trust a forged process identifier in a marker that an attacker can modify but cannot remove, allowing an authorized contender such as another process of the holder's account or root to act as a confused deputy,…","description":"filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, SoftFileLock can trust a forged process identifier in a marker that an attacker can modify but cannot remove, allowing an authorized contender such as another process of the holder's account or root to act as a confused deputy, remove the live marker, and admit another holder. This issue is fixed in version 4.2.1.","published":"2026-10-20T15:17:17.000Z","lastModified":"2026-10-21T18:02:59.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":4.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N"},"cwe":["CWE-345"],"affected":["tox-dev/filelock"],"epss":{"score":0.0014,"percentile":0.03289,"date":"2026-10-26","history":[{"date":"2026-10-21","score":0.00135,"percentile":0.02665}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.14%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-20T15:17:17.000Z","detail":{"score":"4.7","severity":"MEDIUM","publishedAt":"2026-10-20T15:17:16.663Z"},"summary":"New CVE, medium severity (CVSS 4.7)."}],"references":[{"url":"https://github.com/tox-dev/filelock/commit/eeceaa846cbe4df72718d94c8371ca1ab8f5b3cc","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/tox-dev/filelock/pull/836","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/tox-dev/filelock/releases/tag/4.2.1","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-rfpc-qcw5-3pc4","tags":["Exploit","Mitigation","Patch","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-rfpc-qcw5-3pc4","tags":["Exploit","Mitigation","Patch","Vendor Advisory"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-112939","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."}