CVE-2025-4517

Advisory lineage Upstream: 0 Downstream: 35
Deferred
Published: 03 Jun 2025, 12:58
Last modified:21 Apr 2026, 20:17

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.4 CRITICAL
v3.1 (cve.org)
EPSS Score
0.4% LOW
0% probability +0.36%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

03 Jun 2025, 12:58
Published
Vulnerability first disclosed
21 Apr 2026, 20:17
Last Modified
Vulnerability information updated

Description

Allows arbitrary filesystem writes outside the extraction directory during extraction with filter="data". You are affected by this vulnerability if using the tarfile module to extract untrusted tar archives using TarFile.extractall() or TarFile.extract() using the filter= parameter with a value of "data" or "tar". See the tarfile extraction filters documentation https://docs.python.org/3/library/tarfile.html#tarfile-extraction-filter  for more information. Note that for Python 3.14 or later the default value of filter= changed from "no filtering" to `"data", so if you are relying on this new default behavior then your usage is also affected. Note that none of these vulnerabilities significantly affect the installation of source distributions which are tar archives as source distributions already allow arbitrary code execution during the build process. However when evaluating source distributions it's important to avoid installing source distributions with suspicious links.

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.4CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

EPSS Trends

Current EPSS score: 0.40%• Percentile: 61%

Techniques & Countermeasures

  • CWE-22•Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

    The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Affected Systems

  • python software foundation•cpython

    < 3.9.23 | ≥ 3.10.0, < 3.10.18 | < 3.10.18 | ≥ 3.11.0, < 3.11.13 | ≥ 3.12.0, < 3.12.11 | ≥ 3.13.0, < 3.13.4 | ≥ 3.14.0a1, < 3.14.0b3

References (12)