filelock: StrictSoftFileLock creates its claim directories without the lock mode, so another local user with a write bit on them can end a live hold

影響: pip:filelock >= 3.30.0, <= 4.2.0 → 4.2.1

StrictSoftFileLock and AsyncStrictSoftFileLock apply the caller's mode to the sentinel (the lock file at ) and to both claim files (the files whose presence says a process wants or holds the lock). They create the two directories that hold the claims, .filelock and .filelock/claims, with a bare mkdir(). That gives 0o777 filtered through the umask (a per-process mask that removes permission bits from new files and directories) or, under a parent with a default ACL (an access control list on a di…

在 GitHub Advisory Database 阅读

2026/10/29 06:09，GitHub Advisory Database 发布了“filelock: StrictSoftFileLock creates its claim directories without the lock mode, so another local user with a write bit on them can end a live hold”（类型：漏洞公告）。严重程度为“中危”（medium）。相关技术：Python。CVE：CVE-2026-112908。