High 8.1Published Jul 3, 2026

CVE-2025-71359picklescan - Unsafe Deserialization via lib2to3.pgen2.grammar.Grammar.loads

Updated under an hour ago (Oct 28, 2026, 8:30 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for picklescan

Exploited in the last 30 days

picklescan before 0.0.29 fails to detect malicious pickle payloads that utilize lib2to3.pgen2.grammar.Grammar.loads in the reduce method, allowing remote code execution. Attackers can craft pickle files embedding dangerous code that evades picklescan detection and executes during pickle.load() deserialization.

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-502
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Jul 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

picklescan picklescan picklescan:picklescan (from the name)	before 0.0.29; 0.0.29 not affected	CNA record

References

References

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-f54q-57x4-jg88	vendor-advisory
https://www.vulncheck.com/advisories/picklescan-unsafe-deserialization-via-lib2to3-pgen2-grammar-grammar-loads	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.