# CVE-2026-4360

## Summary

- **CVE ID:** CVE-2026-4360
- **Severity:** LOW
- **CVSS Score:** 2 (CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-281
- **Published:** Jun 30, 2026
- **Last Modified:** Aug 13, 2026

## 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.

## Affected Products

- Python Software Foundation — CPython (0)
- Python Software Foundation — CPython (3.15.0a1)
- Python Software Foundation — CPython (3.14.0)
- Python Software Foundation — CPython (3.11.0)
- Python Software Foundation — CPython (3.12.0)
- Python Software Foundation — CPython (3.13.0)

## References

- [CNA](https://mail.python.org/archives/list/security-announce@python.org/thread/TWZW2PC2AZOV6FENIHFSRC63OM7MBGSB/)
- [CNA](https://github.com/python/cpython/pull/151988)
- [CNA](https://github.com/python/cpython/issues/151987)
- [CNA](https://github.com/python/cpython/commit/5e0ef3f1afe892e4f64eb83368db57ac4c40cba0)
- [CNA](https://github.com/python/cpython/commit/7b57e8d51446297b8c7c482d224bc5f1938e4301)
- [CNA](https://github.com/python/cpython/commit/7ccdbaba2c54250a70d7f25632152df7655a5e0a)
- [CNA](https://github.com/python/cpython/commit/eee3ddf0ca10283cc7fea724aae9cd8665f8d15e)
- [CNA](https://github.com/python/cpython/commit/d2b2f5eacab4dd48446b63340613b05dcbbf0b44)
- [CNA](https://github.com/python/cpython/commit/cf23b9153181062150d061468b6d24af33fe214f)
- [CNA](https://github.com/python/cpython/commit/0367912be336348b30572f8029cec4a282782d92)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.28%
- **EPSS Percentile:** 20.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._