Vulnerability · Published Jun 17, 2026 · Assigned by VulnCheck

CVE-2026-53873picklescan - Arbitrary Code Execution via profile.run() Blocklist Bypass

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 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.5%top 60.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

picklescan before 1.0.4 contains an incomplete blocklist for the profile module that fails to block the module-level profile.run() function, allowing attackers to achieve arbitrary code execution via exec(). Attackers can craft malicious pickle files calling profile.run(statement) to execute arbitrary Python code while picklescan reports zero security issues.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	picklescan	1.0.4	GHSA-7wx9-6375-f5wh
PyPI	picklescan	1.0.4	PYSEC-2026-455

Affected products (as reported)

Vendor	Product	Versions
picklescan	picklescan	0 – before 1.0.4

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-7wx9-6375-f5wh vendor-advisory
VulnCheck Advisory: picklescan - Arbitrary Code Execution via profile.run() Blocklist Bypass third-party-advisory