CVE-2025-71367: picklescan - Remote Code Execution via _operator.attrgetter Detection Bypass

Severity: high (CVSS 8.1 v3.1)
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: 2026-07-04 · updated 2026-10-12
Weakness: CWE-502

Description

picklescan before 0.0.34 fails to detect _operator.attrgetter function calls in pickle payloads, allowing attackers to bypass security checks. Remote attackers can craft malicious pickle files using _operator.attrgetter in reduce methods to execute arbitrary code when pickle.load() processes the file.

Affected products

picklescan: before 0.0.34 — fixed in 0.0.34

How to fix

Upgrade to a fixed version: picklescan 0.0.34. Check the vendor advisory for mitigations.

References

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-46h3-79wf-xr6c
https://www.vulncheck.com/advisories/picklescan-remote-code-execution-via-operator-attrgetter-detection-bypass
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-46h3-79wf-xr6c

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