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Vulnerability record · CVE-2025-71323 · published 17 June 2026

CVE-2025-71323: picklescan before 0.0.33 fails to block the ctypes module, allowing attackers to achieve remote code execution…

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.

9.3 CVSS 4.0 Critical EPSS 0.76% · top 46.6% CWE-184 · CWE-184 Deferred
9.3CVSS 4.0 base score
0.76%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-4675-36f9-wf6r
https://www.vulncheck.com/advisories/picklescan-remote-code-execution-via-unblocked-ctypes-module
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-4675-36f9-wf6r

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Source: NIST National Vulnerability Database (record CVE-2025-71323), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.