filelock: WindowsFileLock ignores mode: a 0o600 lock file and the ReadWriteLock database inherit the directory ACL

影響: pip:filelock >= 3.10.0, <= 4.2.0 → 4.2.1

filelock on Windows ignores the mode argument. FileLock(path, mode=0o600) creates the same file as FileLock(path): one with no security descriptor of its own (the Windows record that says who may access a file). Its access list, or ACL, is whatever the lock directory hands down to new files. filelock creates the ReadWriteLock database, which it asks to be 0o600, the same way. In a directory whose inheritable ACL grants other local accounts access to new files, those accounts can open the lock f…

在 GitHub Advisory Database 阅读

2026/10/29 06:08，GitHub Advisory Database 发布了“filelock: WindowsFileLock ignores mode: a 0o600 lock file and the ReadWriteLock database inherit the directory ACL”（类型：漏洞公告）。严重程度为“中危”（medium）。相关技术：Python、Windows。CVE：CVE-2026-112910。