CVSS 3.3 (low) · published 2026-10-20
filelock is a platform-independent file lock for Python. From 4.1.0 until 4.2.1, SoftReadWriteLock and AsyncSoftReadWriteLock cache a successful check of the <path>.rw lock tree and resolve its names again during later record operations, allowing another local user who can replace that tree after the first acquisition to redirect lock-record writes into directories writable by the lock user. This issue is fixed in version 4.2.1.
Affected products (NVD): tox-dev filelock
Fixed in (NVD): 4.2.1
Weakness: CWE-367
Source: NVD CVE-2026-112941
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