filelock: ReadWriteLock follows a symlink at the lock path into SQLite

影響: pip:filelock >= 3.20.4, <= 4.0.8 → 4.0.9

ReadWriteLock and AsyncReadWriteLock resolve the lock path with pathlib.Path.resolve() and pass it to sqlite3.connect() without refusing a symlink. A local user who can create names in the lock's directory, such as /tmp or a shared cache, can plant a symlink at the lock path and make the victim's process create, lock, or write the file it points to, or break mutual exclusion between the victim's own processes. Details ReadWriteLock.__init__ stores pathlib.Path(lock_file).resolve(), which follow…

在 GitHub Advisory Database 阅读

2026/10/29 06:08，GitHub Advisory Database 发布了“filelock: ReadWriteLock follows a symlink at the lock path into SQLite”（类型：漏洞公告）。严重程度为“中危”（medium）。相关技术：Python、SQLite。CVE：CVE-2026-112936。