Vulnerability · Published Jun 21, 2026 · Assigned by VulnCheck

CVE-2025-71351picklescan - Remote Code Execution via timeit.timeit() Detection Bypass

High 7.6

In plain English

A high-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 0.6% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.6High

Exploit odds (30 days)0.6%top 53.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

picklescan before 0.0.25 fails to detect malicious pickle files that use timeit.timeit() in the __reduce__ method, allowing remote code execution. Attackers can craft pickle files that import dangerous libraries like os and execute arbitrary system commands, which evade picklescan detection and execute when pickle.load() is called.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	picklescan	0.0.25	GHSA-v7x6-rv5q-mhwc
PyPI	picklescan	0.0.25	PYSEC-2026-4135

Affected products (as reported)

Vendor	Product	Versions
picklescan	picklescan	0 – before 0.0.25

Weakness: CWE-184 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References

GHSA Advisory GHSA-v7x6-rv5q-mhwc vendor-advisory
VulnCheck Advisory: picklescan - Remote Code Execution via timeit.timeit() Detection Bypass third-party-advisory