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CVE-2026-4360
Tarfile.extract() doesn't fully respect filter parameter
Low2.0EPSS 0.48%
- Published
- Updated
- Reserved
- Assigned by
- PSF
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.
Timeline
ID reserved
By PSF
- 4 months later
· 4 months later
Published
- 44 days later
· 44 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| PSFCNA (assigner) | 4.0 | Low2.0 | 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 |
| NVDNVD · Modified | 4.0 | Low2.0 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.48% · top 58% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 2.0.
Weakness
Affected products
Python Software Foundation · CPython
- affected < 3.10.21
- affected 3.11.0 – < 3.11.16
- affected 3.12.0 – < 3.12.14
- affected 3.13.0 – < 3.13.15
- affected 3.14.0 – < 3.14.7
- affected 3.15.0a1 – < 3.15.0b4
References (10)
- https://mail.python.org/archives/list/[email protected]/thread/TWZW2PC2AZOV6FENIHFSRC63OM7MBGSB/ (opens in a new tab)vendor-advisory
- https://github.com/python/cpython/pull/151988 (opens in a new tab)patch
- https://github.com/python/cpython/issues/151987 (opens in a new tab)issue-tracking
- https://github.com/python/cpython/commit/5e0ef3f1afe892e4f64eb83368db57ac4c40cba0 (opens in a new tab)patch
- https://github.com/python/cpython/commit/7b57e8d51446297b8c7c482d224bc5f1938e4301 (opens in a new tab)patch
- https://github.com/python/cpython/commit/7ccdbaba2c54250a70d7f25632152df7655a5e0a (opens in a new tab)patch
- https://github.com/python/cpython/commit/eee3ddf0ca10283cc7fea724aae9cd8665f8d15e (opens in a new tab)patch
- https://github.com/python/cpython/commit/d2b2f5eacab4dd48446b63340613b05dcbbf0b44 (opens in a new tab)patch
- https://github.com/python/cpython/commit/cf23b9153181062150d061468b6d24af33fe214f (opens in a new tab)patch
- https://github.com/python/cpython/commit/0367912be336348b30572f8029cec4a282782d92 (opens in a new tab)patch
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-4360)Record last updated .