CVE-2026-4360
Medium
Description
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.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Python
PublishedJun 30, 2026
First seenJun 30, 2026
Weakness typeCWE-281CWE-281
How to fix
Update
- python python3.1.5 or later
Patches
- github.com/python/cpython/pull/151988
- github.com/python/cpython/commit/5e0ef3f1afe892e4f64eb83368db57ac4c40cba0
- github.com/python/cpython/commit/7b57e8d51446297b8c7c482d224bc5f1938e4301
- github.com/python/cpython/commit/7ccdbaba2c54250a70d7f25632152df7655a5e0a
- github.com/python/cpython/commit/eee3ddf0ca10283cc7fea724aae9cd8665f8d15e
- github.com/python/cpython/commit/d2b2f5eacab4dd48446b63340613b05dcbbf0b44
- github.com/python/cpython/commit/cf23b9153181062150d061468b6d24af33fe214f
- github.com/python/cpython/commit/0367912be336348b30572f8029cec4a282782d92
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| python python | v < 3.1.5 | 3.1.5 |
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