{"id":"CVE-2026-112935","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-112935","generatedAt":"2026-10-28T04:18:05.081Z","title":"From 3.22.0 until 4.2.1, SoftFileLock can break a stale marker after an attacker frees its own marker following the stale read, an honest contender creates a live successor on the reused inode, and the successor's modification time is not newer than the…","description":"filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, SoftFileLock can break a stale marker after an attacker frees its own marker following the stale read, an honest contender creates a live successor on the reused inode, and the successor's modification time is not newer than the saved observation, causing the live marker to be removed and two holders to be admitted. This issue is fixed in version 4.2.1.","published":"2026-10-20T15:17:16.000Z","lastModified":"2026-10-21T21:12:13.000Z","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-367"],"affected":["tox-dev/filelock"],"epss":{"score":0.00132,"percentile":0.02756,"date":"2026-10-27","history":[{"date":"2026-10-21","score":0.00086,"percentile":0.00306}]},"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 (0.13%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-20T15:17:16.000Z","detail":{"score":"4.7","severity":"MEDIUM","publishedAt":"2026-10-20T15:17:16.243Z"},"summary":"New CVE, medium severity (CVSS 4.7)."}],"references":[{"url":"https://github.com/tox-dev/filelock/commit/740ff666b62a88496c8d7394e4e6230605e4d62b","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/tox-dev/filelock/pull/843","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-fq56-3cx3-fjxp","tags":["Exploit","Mitigation","Patch","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-112935","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."}