What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-06-20 · updated 2026-06-24
• Weakness: CWE-502

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 products

• picklescan: before 1.0.1 — fixed in 1.0.1

How to fix

Upgrade to a fixed version: picklescan 1.0.1. Check the vendor advisory for mitigations.

References

• https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m7j5-r2p5-c39r
• https://www.vulncheck.com/advisories/picklescan-arbitrary-file-creation-via-logging-filehandler-deserialization
• https://github.com/mmaitre314/picklescan/security/advisories/GHSA-m7j5-r2p5-c39r

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