CVE-2025-71361: picklescan - Remote Code Execution via Undetected idlelib.calltip.Calltip.fetch_tip

Severity: high (CVSS 8.1 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: none known
Published: 2026-06-24 · updated 2026-10-12
Weakness: CWE-95

Description

picklescan before 0.0.29 fails to detect malicious idlelib.calltip.Calltip.fetch_tip calls in pickle files, allowing remote code execution. Attackers can embed undetected payloads in pickle files that execute arbitrary code when loaded via pickle.load().

Affected products

picklescan: before 0.0.29 — fixed in 0.0.29

How to fix

Upgrade to a fixed version: picklescan 0.0.29. Check the vendor advisory for mitigations.

References

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-8r4j-24qv-fmq9
https://www.vulncheck.com/advisories/picklescan-remote-code-execution-via-undetected-idlelib-calltip-calltip-fetch-tip
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-8r4j-24qv-fmq9

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