Vulnerability · Published Jun 30, 2026 · Assigned by VulnCheck

CVE-2025-71352picklescan - Remote Code Execution via Undetected trace.Trace.runctx in Pickle Files

High 8.1

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 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.7%top 46.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

picklescan before 0.0.29 fails to detect the built-in Python trace.Trace.runctx function when used in pickle file reduce methods, allowing attackers to execute arbitrary code. Remote attackers can craft malicious pickle files with trace.Trace.runctx payloads that bypass picklescan detection and execute code upon pickle.load() invocation.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	picklescan	0.0.29	GHSA-g344-hcph-8vgg

Affected products (as reported)

Vendor	Product	Versions
picklescan	picklescan	0 – before 0.0.29

Weakness: CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

References

GitHub Security Advisory (GHSA-g344-hcph-8vgg) vendor-advisory
VulnCheck Advisory: picklescan - Remote Code Execution via Undetected trace.Trace.runctx in Pickle Files third-party-advisory