Unrated severityNVD Advisory· Published Oct 31, 2025· Updated Mar 3, 2026
Quadratic complexity in os.path.expandvars() with user-controlled template
CVE-2025-6075
Description
If the value passed to os.path.expandvars() is user-controlled a performance degradation is possible when expanding environment variables.
Affected products
1- Range: 0
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
9- github.com/python/cpython/commit/2e6150adccaaf5bd95d4c19dfd04a36e0b325d8cmitrepatch
- github.com/python/cpython/commit/5dceb93486176e6b4a6d9754491005113eb23427mitrepatch
- github.com/python/cpython/commit/631ba3407e3348ccd56ce5160c4fb2c5dc5f4d84mitrepatch
- github.com/python/cpython/commit/892747b4cf0f95ba8beb51c0d0658bfaa381ebcamitrepatch
- github.com/python/cpython/commit/9ab89c026aa9611c4b0b67c288b8303a480fe742mitrepatch
- github.com/python/cpython/commit/c8a5f3435c342964e0a432cc9fb448b7dbecd1bamitrepatch
- github.com/python/cpython/commit/f029e8db626ddc6e3a3beea4eff511a71aaceb5cmitrepatch
- mail.python.org/archives/list/security-announce@python.org/thread/IUP5QJ6D4KK6ULHOMPC7DPNKRYQTQNLA/mitrevendor-advisory
- github.com/python/cpython/issues/136065mitreissue-tracking
News mentions
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