{"id":"CVE-2026-112912","revision":"c581b74e9e5a45ea8ea91d7f8201c936","records":[{"revision":"c581b74e9e5a45ea8ea91d7f8201c936","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-112912","aliases":[],"title":"filelock: Symlink swap during SoftFileLock's writability check leaks whether a path exists and is writable by the lock taker","description":"filelock is a platform-independent file lock for Python. From 3.32.6 until 4.2.1, SoftFileLock can follow a swapped symbolic link during the conditional os.access writability check for a node without its owner-write bit, allowing another local user on a platform and directory configuration that follows the link to infer whether a chosen path exists and is writable from the observable acquisition result. This issue is fixed in version 4.2.1.","state":0,"publishedAt":"2026-10-20T14:23:18.993+00:00","modifiedAt":"2026-10-20T15:37:56.208+00:00","affected":[{"ecosystem":"Vendor product","name":"filelock","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"tox-dev\",\n                    \"product\": \"filelock\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 3.32.6, < 4.2.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","score":2.5,"severity":"LOW"}],"references":["https://github.com/tox-dev/filelock/security/advisories/GHSA-9j6q-wvj5-jgjg","https://github.com/tox-dev/filelock/pull/835","https://github.com/tox-dev/filelock/commit/e1e825b1992f69fb6b346dc395d5ae4893536c0a","https://github.com/tox-dev/filelock/releases/tag/4.2.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112912","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-112912","identifiers":["CVE-2026-112912"]},"retained":false,"historicalAffected":[]}],"coverage":[]}