What’s Vulnerable › Vulnerabilities

CVE-2025-71344: picklescan - Arbitrary Code Execution via Undetected ensurepip._run_pip Function

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-22 · updated 2026-10-12
• Weakness: CWE-502

Description

picklescan before 0.0.30 (affected versions 0.0.26 and earlier) fails to detect the ensurepip._run_pip built-in function when scanning pickle files, allowing attackers to execute arbitrary code. Malicious pickle files embedding ensurepip._run_pip calls in __reduce__ methods bypass picklescan detection and achieve remote code execution upon pickle.load() invocation.

Affected products

• picklescan: before 0.0.30 — fixed in 0.0.30

How to fix

Upgrade to a fixed version: picklescan 0.0.30. Check the vendor advisory for mitigations.

References

• https://github.com/mmaitre314/picklescan/security/advisories/GHSA-xp4f-hrf8-rxw7
• https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-undetected-ensurepip-run-pip-function
• https://github.com/mmaitre314/picklescan/security/advisories/GHSA-xp4f-hrf8-rxw7

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