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TI-2025-43479 Aliases CVE-2025-71359GHSA-vp8m-mf3r-82q9

picklescan - Unsafe Deserialization via lib2to3.pgen2.grammar.Grammar.loads

Priority HIGH 68CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00613 49th percentileScored 2026-11-07
Fix Fixed picklescan (picklescan): 0.0.29

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
picklescanpicklescanbefore 0.0.290.0.29Patch availableCNA
  • picklescan Vendorpicklescan Affected before 0.0.29 Fixed in 0.0.29 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:mmaitre314:picklescan:*:*:*:*:*:*:*:*——picklescan
  • cpe:2.3:a:mmaitre314:picklescan:*:*:*:*:*:*:*:* Versions — — ·picklescan

Remediation

  • Fix · CNA picklescan (picklescan) Fixed in 0.0.29

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    picklescan 0.0.29

    2 records Highest priority Priority HIGH 2 HIGH

    Other records, highest priority first

    • TI-2025-43480 picklescan - Remote Code Execution via Undetected idlelib.calltip.get_entityPriority HIGH 68
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-71359
  2. 2026-10-03 Alias added: GHSA-vp8m-mf3r-82q9

References

Advisory 1

  • TI-2026-03009 picklescan - Universal Blocklist Bypass via pkgutil.resolve_name CVSS 4.0CRITICAL 10.0
  • TI-2026-40680 picklescan - Remote Code Execution via Unblocked Standard Library Modules CVSS 4.0CRITICAL 9.3
  • TI-2026-38870 picklescan - Arbitrary Code Execution via Obfuscated eval Call CVSS 4.0CRITICAL 9.3
  • TI-2026-38869 picklescan - Arbitrary Code Execution via profile.run() Blocklist Bypass CVSS 4.0CRITICAL 9.3
  • TI-2025-43446 picklescan - Detection Bypass via STACK_GLOBAL Opcode Parsing Logic Flaw CVSS 4.0CRITICAL 9.3
  • TI-2025-43444 picklescan - Remote Code Execution via Unblocked ctypes Module CVSS 4.0CRITICAL 9.3
See all 57 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences