What’s Vulnerable › Vulnerabilities

CVE-2025-71355: Picklescan - Arbitrary Code Execution via Unsafe Numpy Function Detection Bypass

• Severity: high (CVSS 7.6 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-30 · updated 2026-10-12
• Weakness: CWE-184

Description

Picklescan before 0.0.25 fails to detect unsafe global functions in the Numpy library, allowing attackers to bypass static analysis and execute arbitrary code during deserialization. Attackers can craft malicious pickle files using numpy.testing._private.utils.runstring within the reduce method to import dangerous libraries like os and execute arbitrary OS commands when the pickle file is loaded.

Affected products

• picklescan: before 0.0.25 — fixed in 0.0.25

How to fix

Upgrade to a fixed version: picklescan 0.0.25. Check the vendor advisory for mitigations.

References

• https://github.com/mmaitre314/picklescan/security/advisories/GHSA-fj43-3qmq-673f
• https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-unsafe-numpy-function-detection-bypass
• https://github.com/mmaitre314/picklescan/security/advisories/GHSA-fj43-3qmq-673f

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