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Vulnerability record · CVE-2025-13462 · published 12 March 2026

CVE-2025-13462: Python improper input validation vulnerability

Python · Python

The "tarfile" module would still apply normalization of AREGTYPE (\x00) blocks to DIRTYPE, even while processing a multi-block member such as GNUTYPE_LONGNAME or GNUTYPE_LONGLINK. This could result in a crafted tar archive being misinterpreted by the tarfile module compared to other implementations.

2.0 CVSS 4.0 Low EPSS 0.18% · top 92.1% CWE-20 · Improper input validationCWE-74 · Injection
2.0CVSS 4.0 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
9References
13 Aug 2026Last modified by NVD

Description

The "tarfile" module would still apply normalization of AREGTYPE (\x00) blocks to DIRTYPE, even while processing a multi-block member such as GNUTYPE_LONGNAME or GNUTYPE_LONGLINK. This could result in a crafted tar archive being misinterpreted by the tarfile module compared to other implementations.

CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/python/cpython/commit/42d754e34c06e57ad6b8e7f92f32af679912d8ab Patch
https://github.com/python/cpython/commit/72dde1016493c52abe857fc4a7bf6c40138b4114 Patch
https://github.com/python/cpython/commit/7ad3093d76a748af55bdb1d2e8aad3638163b017 Patch
https://github.com/python/cpython/commit/9a23b753552afa28e3a2f4d8863572fc66479406 Patch
https://github.com/python/cpython/commit/ae99fe3a33b43e303a05f012815cef60b611a9c7 Patch
https://github.com/python/cpython/commit/d10950739a78f54d0718d88fb5a868374603c084 Patch
https://github.com/python/cpython/issues/141707 Issue Tracking
https://github.com/python/cpython/pull/143934 Issue TrackingPatch
https://mail.python.org/archives/list/security-announce@python.org/thread/EOMI5I66ZMKQ2INNFT6T7IAIKUGPZYIE/ Mailing ListVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-13462), CISA KEV, FIRST EPSS (scores of 2026-11-13). This page is refreshed as NVD updates the record.