CVE-2026-112939

{"id": "CVE-2026-112939", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-112939", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-20T15:14:32.481979Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.0}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "tox-dev", "product": "filelock", "versions": [{"status": "affected", "version": ">= 3.22.0, < 4.2.1"}]}]}], "published": "2026-10-20T15:17:16.663", "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"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-345"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-10-21T18:02:59.067", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:tox-dev:filelock:*:*:*:*:*:python:*:*", "vulnerable": true, "matchCriteriaId": "5011FF77-7621-4E3E-8642-79A413FEAE97", "versionEndExcluding": "4.2.1", "versionStartIncluding": "3.22.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}