CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2025-8194
High (7.5). EPSS 0.8% chance of exploitation in the next 30 days.
There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives.
This vulnerability can be mitigated by including the following patch after importing the “tarfile” module: https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
Severity
- EPSS
- 0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-31)
- CWE
- CWE-835
- Published
- Modified
- Record from
- the NVD, synced
References
- https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
- https://github.com/python/cpython/commit/57f5981d6260ed21266e0c26951b8564cc252bc2
- https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38
- https://github.com/python/cpython/commit/73f03e4808206f71eb6b92c579505a220942ef19
- https://github.com/python/cpython/commit/b4ec17488eedec36d3c05fec127df71c0071f6cb