Vulnerability · Published Jun 17, 2026 · Assigned by VulnCheck

CVE-2025-71320picklescan - Remote Code Execution via Incomplete Disallowed Inputs

Critical 9.8

In plain English

A critical-severity security flaw in picklescan from picklescan. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.8%top 42.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

picklescan before 0.0.33 contains an incomplete deny-list that fails to block pydoc.locate and operator.methodcaller functions, allowing attackers to bypass security checks. Remote attackers can craft malicious pickle files using these unblocked functions to achieve arbitrary code execution when the pickle is deserialized.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	picklescan	0.0.33	GHSA-84r2-jw7c-4r5q
PyPI	picklescan	0.0.33	PYSEC-2026-1785

Affected products (as reported)

Vendor	Product	Versions
picklescan	picklescan	0 – before 0.0.33

Weakness: CWE-184 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

GHSA Advisory GHSA-84r2-jw7c-4r5q vendor-advisory
VulnCheck Advisory: picklescan - Remote Code Execution via Incomplete Disallowed Inputs third-party-advisory