What’s Vulnerable › Vulnerabilities

CVE-2026-56315: picklescan - Remote Code Execution via Unblocked Standard Library Modules

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-23 · updated 2026-06-23
• Weakness: CWE-184

Description

picklescan before 1.0.4 fails to block at least seven Python standard library modules (including uuid, _osx_support, _aix_support, _pyrepl.pager, and imaplib) exposing eight functions that provide direct arbitrary command execution. Attackers can craft malicious pickle files importing these unblocked modules to achieve remote code execution while bypassing picklescan's safety validation entirely.

Affected products

• picklescan: before 1.0.4 — fixed in 1.0.4

How to fix

Upgrade to a fixed version: picklescan 1.0.4. Check the vendor advisory for mitigations.

References

• https://github.com/mmaitre314/picklescan/security/advisories/GHSA-g38g-8gr9-h9xp
• https://www.vulncheck.com/advisories/picklescan-remote-code-execution-via-unblocked-standard-library-modules
• https://github.com/mmaitre314/picklescan/security/advisories/GHSA-g38g-8gr9-h9xp

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