What’s Vulnerable › Vulnerabilities

CVE-2025-1889: picklescan - Security scanning bypass via non-standard file extensions

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-03-03 · updated 2026-06-17
• Weakness: CWE-646

Description

picklescan before 0.0.22 only considers standard pickle file extensions in the scope for its vulnerability scan. An attacker could craft a malicious model that uses Pickle and include a malicious pickle file with a non-standard file extension. Because the malicious pickle file inclusion is not considered as part of the scope of picklescan, the file would pass security checks and appear to be safe, when it could instead prove to be problematic.

Affected products

• picklescan: before 0.0.22 — fixed in 0.0.22

How to fix

Upgrade to a fixed version: picklescan 0.0.22. Check the vendor advisory for mitigations.

References

• https://github.com/mmaitre314/picklescan/security/advisories/GHSA-655q-fx9r-782v
• https://www.sonatype.com/security-advisories/cve-2025-1889

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