CVE-2025-71321CWE-502insecure-deserialization

CVE-2025-71321

Critical · published June 17, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
56.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00824 · 56.9th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-06-17T21:16Z
References (3)
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m273-6v24-x4m4 · [email protected]https://www.vulncheck.com/advisories/picklescan-arbitrary-file-writing-via-distutils-module-bypass · [email protected]https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m273-6v24-x4m4 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 JUN 15:04Z
    picklescan - Arbitrary File Writing via distutils Module Bypass
    cvelistv5