CVE-2025-4435
Tarfile extracts filtered members when errorlevel=0
- State
- Published
- Severity
- 7.5 High
- Published
- Jun 3, 2025
- Updated
- Jul 31, 2026
- Reserved
- May 8, 2025
Description
When using a TarFile.errorlevel = 0 and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of TarFile.errorlevel = 0 in affected versions is that the member would still be extracted and not skipped.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | PSF |
Weaknesses
- CWE-682 Incorrect Calculation
Affected Products
| Product | Versions |
|---|---|
CPythonPython Software Foundation |
|
References
- https://github.com/python/cpython/issues/135034issue-tracking
- https://github.com/python/cpython/pull/135037patch
- https://mail.python.org/archives/list/security-announce@python.org/thread/MAXIJJCUUMCL7ATZNDVEGGHUMQMUUKLG/vendor-advisory
- https://github.com/python/cpython/commit/3612d8f51741b11f36f8fb0494d79086bac9390apatch
- https://github.com/python/cpython/commit/9e0ac76d96cf80b49055f6d6b9a6763fb9215c2apatch
- https://github.com/python/cpython/commit/19de092debb3d7e832e5672cc2f7b788d35951dapatch
- https://github.com/python/cpython/commit/aa9eb5f757ceff461e6e996f12c89e5d9b583b01patch
- https://github.com/python/cpython/commit/28463dba112af719df1e8b0391c46787ad756dd9patch
- https://github.com/python/cpython/commit/4633f3f497b1ff70e4a35b6fe2c907cbe2d4cb2epatch
- https://github.com/python/cpython/commit/9c1110ef6652687d7c55f590f909720eddde965apatch
- https://github.com/python/cpython/commit/dd8f187d0746da151e0025c51680979ac5b4cfb1patch
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.