CVE-2026-53874: picklescan - Arbitrary Code Execution via Obfuscated eval Call

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-17 · updated 2026-06-23
Weakness: CWE-502

Description

picklescan before 1.0.1 contains an unsafe deserialization vulnerability allowing unauthenticated users to execute arbitrary code by hiding eval calls nested under callable objects via getattr. Attackers can embed malicious code in pickle files that evades detection but executes when the pickle is loaded from untrusted sources.

Affected products

picklescan: before 1.0.1 — fixed in 1.0.1

How to fix

Upgrade to a fixed version: picklescan 1.0.1. Check the vendor advisory for mitigations.

References

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-9m3x-qqw2-h32h
https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-obfuscated-eval-call
https://github.com/mmaitre314/picklescan/security/advisories/GHSA-9m3x-qqw2-h32h

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