CVE-2025-71321

CRITICAL 9.8

picklescan - Arbitrary File Writing via distutils Module Bypass

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

picklescan before 0.0.33 contains an arbitrary file writing vulnerability that allows attackers to bypass the dangerous blocklist by using distutils.file_util.write_file. Attackers can construct malicious pickle objects to overwrite critical system files and achieve denial of service or remote code execution.

CWE	CWE-502
Vendor	picklescan
Product	picklescan
Published	Jun 17, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

picklescan / picklescan

0 < 0.0.33

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m273-6v24-x4m4 vulncheck.com: https://www.vulncheck.com/advisories/picklescan-arbitrary-file-writing-via-distutils-module-bypass

Credits

🔍 0x-Apollyon