CVE-2025-13462: Vulnerability in Python Software Foundation CPython
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.
AI Analysis
Technical Summary
CVE-2025-13462 describes a vulnerability in the CPython tarfile module where AREGTYPE (\x00) blocks are normalized to DIRTYPE even when processing multi-block members such as GNUTYPE_LONGNAME or GNUTYPE_LONGLINK. This inconsistency in normalization can lead to misinterpretation of crafted tar archives by the tarfile module relative to other implementations. The issue affects specific CPython versions including 3.11.0 through 3.15.0a1. The CVSS 4.0 base score is 2.0, indicating low severity, with attack vector local, high attack complexity, and partial impact on integrity and availability.
Potential Impact
The vulnerability may cause the tarfile module to incorrectly interpret crafted tar archives, potentially leading to unexpected behavior when processing such archives. However, the impact is limited as indicated by the low CVSS score and does not include privilege escalation or remote code execution. No known exploits are reported in the wild.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the Python Software Foundation advisory for current remediation guidance. Given the low severity and lack of known exploits, immediate action may not be required but monitoring vendor updates is recommended.
CVE-2025-13462: Vulnerability in Python Software Foundation CPython
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 v4.0
Score 2.0low
Affected software
Python Software Foundation
CPython
pkg:github/CPythonRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-13462 describes a vulnerability in the CPython tarfile module where AREGTYPE (\x00) blocks are normalized to DIRTYPE even when processing multi-block members such as GNUTYPE_LONGNAME or GNUTYPE_LONGLINK. This inconsistency in normalization can lead to misinterpretation of crafted tar archives by the tarfile module relative to other implementations. The issue affects specific CPython versions including 3.11.0 through 3.15.0a1. The CVSS 4.0 base score is 2.0, indicating low severity, with attack vector local, high attack complexity, and partial impact on integrity and availability.
Potential Impact
The vulnerability may cause the tarfile module to incorrectly interpret crafted tar archives, potentially leading to unexpected behavior when processing such archives. However, the impact is limited as indicated by the low CVSS score and does not include privilege escalation or remote code execution. No known exploits are reported in the wild.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the Python Software Foundation advisory for current remediation guidance. Given the low severity and lack of known exploits, immediate action may not be required but monitoring vendor updates is recommended.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- PSF
- Date Reserved
- 2025-11-19T22:05:07.578Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69b302c82f860ef943d65de2
Added to database: 03/12/2026, 18:15:36 UTC
Last enriched: 08/13/2026, 13:08:45 UTC
Last updated: 09/15/2026, 01:57:22 UTC
Views: 580
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