CVE-2026-112913 (GCVE-0-2026-112913)
Vulnerability from cvelistv5 – Published: 2026-11-05 21:48 – Updated: 2026-11-06 17:37
VLAI
EPSS
VEX
Title
filelock: ReadWriteLock on Windows acts on SQLite side files another local user places beside its database
Summary
filelock is a platform-independent file lock for Python. From 3.20.4 until 4.2.1, ReadWriteLock and AsyncReadWriteLock on Windows use _connect to attach SQLite to the lock database by pathname, allowing another local account that can create adjacent names to place a database-wal or database-journal side file before acquisition. An undeletable WAL file makes each read or write acquisition fail immediately with sqlite3.OperationalError regardless of timeout. Separately, when the database contains at least one table, a hot journal that grants the lock account modify rights can cause SQLite recovery to delete a file named by that journal only when the lock account has permission to delete the target. The issue requires a directory writable by another account, such as a shared Windows temporary directory, and does not affect private directories. This issue is fixed in version 4.2.1.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 17:37 UTC
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
GitHub_M
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/tox-dev/filelock/security/advi… | x_refsource_CONFIRM |
| https://github.com/tox-dev/filelock/pull/834 | x_refsource_MISC |
| https://github.com/tox-dev/filelock/pull/854 | x_refsource_MISC |
| https://github.com/tox-dev/filelock/commit/1f582d… | x_refsource_MISC |
| https://github.com/tox-dev/filelock/commit/5e3f2e… | x_refsource_MISC |
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Nomenclature
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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