Vulnerability · Published Jun 17, 2026 · Assigned by VulnCheck

CVE-2025-71323picklescan - Remote Code Execution via Unblocked ctypes Module

Critical 9.8

In plain English

A critical-severity security flaw in picklescan from picklescan. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 63% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)1.0%top 37.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

picklescan before 0.0.33 fails to block the ctypes module, allowing attackers to achieve remote code execution by invoking direct syscalls and accessing raw memory. Attackers can craft malicious pickle files using ctypes.WinDLL to load kernel32.dll and execute arbitrary commands, bypassing sandbox protections and gadget chain detection.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	picklescan	0.0.33	GHSA-4675-36f9-wf6r
PyPI	picklescan	0.0.33	PYSEC-2026-1782

Affected products (as reported)

Vendor	Product	Versions
picklescan	picklescan	0 – before 0.0.33

Weakness: CWE-184 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

GHSA Advisory GHSA-4675-36f9-wf6r vendor-advisory
VulnCheck Advisory: picklescan - Remote Code Execution via Unblocked ctypes Module third-party-advisory