Vulnerability · Published Jun 20, 2026 · Assigned by VulnCheck

CVE-2026-56304picklescan - Arbitrary File Creation via logging.FileHandler Deserialization

Medium 6.5

In plain English

A medium-severity unsafe deserialization in picklescan from picklescan. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 61.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

picklescan before 1.0.1 contains an unsafe pickle deserialization vulnerability allowing unauthenticated attackers to create arbitrary zero-byte files via logging.FileHandler class instantiation. Attackers can exploit this by crafting malicious pickle payloads to bypass RCE blocklists and create lock files or other filesystem artifacts, potentially causing denial of service or application disruption.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	picklescan	1.0.1	GHSA-m7j5-r2p5-c39r
PyPI	picklescan	1.0.1	PYSEC-2026-225

Affected products (as reported)

Vendor	Product	Versions
picklescan	picklescan	0 – before 1.0.1

Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

References

GHSA Advisory GHSA-m7j5-r2p5-c39r vendor-advisory
VulnCheck Advisory: picklescan - Arbitrary File Creation via logging.FileHandler Deserialization third-party-advisory