{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-112907", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-19T20:16:09.857Z", "datePublished": "2026-11-05T21:50:04.632Z", "dateUpdated": "2026-11-05T21:50:04.632Z"}, "containers": {"cna": {"title": "filelock: On Windows an oplock on a soft lock's marker holds SoftFileLock.acquire() past its timeout and blocks the stale break", "problemTypes": [{"descriptions": [{"cweId": "CWE-667", "lang": "en", "description": "CWE-667: Improper Locking", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 2.5, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/tox-dev/filelock/security/advisories/GHSA-567q-5qvw-pf92", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/tox-dev/filelock/security/advisories/GHSA-567q-5qvw-pf92"}, {"name": "https://github.com/tox-dev/filelock/pull/835", "tags": ["x_refsource_MISC"], "url": "https://github.com/tox-dev/filelock/pull/835"}, {"name": "https://github.com/tox-dev/filelock/commit/97d694a9a3ee1721d6c79a480174dfd9b060a080", "tags": ["x_refsource_MISC"], "url": "https://github.com/tox-dev/filelock/commit/97d694a9a3ee1721d6c79a480174dfd9b060a080"}, {"name": "https://github.com/tox-dev/filelock/commit/e1e825b1992f69fb6b346dc395d5ae4893536c0a", "tags": ["x_refsource_MISC"], "url": "https://github.com/tox-dev/filelock/commit/e1e825b1992f69fb6b346dc395d5ae4893536c0a"}, {"name": "https://github.com/tox-dev/filelock/releases/tag/4.2.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/tox-dev/filelock/releases/tag/4.2.1"}], "affected": [{"vendor": "tox-dev", "product": "filelock", "versions": [{"version": ">= 3.22.0, < 4.2.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-05T21:50:04.632Z"}, "descriptions": [{"lang": "en", "value": "filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, soft lock classes on Windows read an existing marker with _read_lock_file and remove a stale marker through break_lock_file using pathname operations that wait for an oplock break. Another local account with read access to an unheld marker can keep a Level 1 or batch oplock unanswered, causing SoftFileLock.acquire and related async or fallback locks to wait beyond timeout, blocking=False, and cancel_check. A stale marker under the oplock cannot be broken, but mutual exclusion remains intact and no file other than the marker is accessed. This issue is fixed in version 4.2.1."}], "source": {"advisory": "GHSA-567q-5qvw-pf92", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "filelock", "vendor": "tox-dev", "versions": [{"status": "affected", "version": ">= 3.22.0, < 4.2.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, soft lock classes on Windows read an existing marker with _read_lock_file and remove a stale marker through break_lock_file using pathname operations that wait for an oplock break. Another local account with read access to an unheld marker can keep a Level 1 or batch oplock unanswered, causing SoftFileLock.acquire and related async or fallback locks to wait beyond timeout, blocking=False, and cancel_check. A stale marker under the oplock cannot be broken, but mutual exclusion remains intact and no file other than the marker is accessed. This issue is fixed in version 4.2.1."}], "id": "CVE-2026-112907", "lastModified": "2026-11-05T22:17:46.513", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 2.5, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-11-05T22:17:46.513", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/tox-dev/filelock/commit/97d694a9a3ee1721d6c79a480174dfd9b060a080"}, {"source": "security-advisories@github.com", "url": "https://github.com/tox-dev/filelock/commit/e1e825b1992f69fb6b346dc395d5ae4893536c0a"}, {"source": "security-advisories@github.com", "url": "https://github.com/tox-dev/filelock/pull/835"}, {"source": "security-advisories@github.com", "url": "https://github.com/tox-dev/filelock/releases/tag/4.2.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/tox-dev/filelock/security/advisories/GHSA-567q-5qvw-pf92"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.22.0,4.2.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "filelock", "source": "cna", "vendor": "tox-dev"}, "product": "filelock", "vendor": "tox-dev"}], "created": "2026-11-05T23:45:07.427340+00:00", "updated": "2026-11-06T00:30:18.424966+00:00", "vendors": ["tox-dev", "tox-dev$PRODUCT$filelock"]}