CVE-2026-3490

Critical

Description

picklescan before 1.0.4 fails to block pkgutil.resolve_name, allowing attackers to bypass the entire blocklist by resolving any dangerous function through indirect REDUCE calls. Remote attackers can invoke any blocked function such as os.system, builtins.exec, or subprocess.call to achieve remote code execution.

SeverityCritical

CVSS10.0

Exploit probability—

ProductPicklescan

PublishedJun 17, 2026

First seenJun 17, 2026

Weakness typeCWE-183CWE-183

How to fix

Update

picklescan1.0.4 or later

Vendor advisories

github.com/mmaitre314/picklescan/security/advisories/GHSA-vvpj-8cmc-gx39

Affected products

Product	Affected versions	Fixed in
picklescanPyPI	v < 1.0.4	1.0.4

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