CVE-2026-4360
MEDIUM severity · CVSS 5.3 · CWE-281
5.3CVSS MEDIUM
Summary
In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactLow
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://github.com/python/cpython/commit/5e0ef3f1afe892e4f64eb83368db57ac4c40cba0 ↗
Additional information
- NVD record
- https://github.com/python/cpython/commit/5e0ef3f1afe892e4f64eb83368db57ac4c40cba0Patch
- https://github.com/python/cpython/commit/7b57e8d51446297b8c7c482d224bc5f1938e4301Patch
- https://github.com/python/cpython/commit/7ccdbaba2c54250a70d7f25632152df7655a5e0aPatch
- https://github.com/python/cpython/commit/d2b2f5eacab4dd48446b63340613b05dcbbf0b44Patch
- https://github.com/python/cpython/commit/eee3ddf0ca10283cc7fea724aae9cd8665f8d15ePatch
- https://github.com/python/cpython/issues/151987Patch
- https://github.com/python/cpython/commit/0367912be336348b30572f8029cec4a282782d92
- https://github.com/python/cpython/commit/cf23b9153181062150d061468b6d24af33fe214f