CVE-2026-112909

{"id": "CVE-2026-112909", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-112909", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-22T21:24:59.918929Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 4.2, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "tox-dev", "product": "filelock", "versions": [{"status": "affected", "version": "< 4.2.1"}]}]}], "published": "2026-10-20T15:17:15.313", "references": [{"url": "https://github.com/tox-dev/filelock/commit/e1e825b1992f69fb6b346dc395d5ae4893536c0a", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/tox-dev/filelock/pull/835", "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-69hj-f68j-2879", "tags": ["Exploit", "Mitigation", "Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/tox-dev/filelock/security/advisories/GHSA-69hj-f68j-2879", "tags": ["Exploit", "Mitigation", "Patch", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-706"}]}], "descriptions": [{"lang": "en", "value": "filelock is a platform-independent file lock for Python. Prior to 4.2.1, UnixFileLock can truncate a regular file renamed onto the lock path when another local user has actual rename permission, or hard-linked there under a permissive hard-link policy; when an explicit mode is requested, affected versions from 3.10.2 can also change that file's mode. This issue is fixed in version 4.2.1."}], "lastModified": "2026-10-27T21:04:56.090", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:tox-dev:filelock:*:*:*:*:*:python:*:*", "vulnerable": true, "matchCriteriaId": "D16E2F62-8710-4B7F-A294-6F47B5A71249", "versionEndExcluding": "4.2.1"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}