unsafe pickle deserialization in picklescan <1.0.1 via logging.FileHandler
CVE-2026-56304 Published on June 20, 2026
picklescan - Arbitrary File Creation via logging.FileHandler Deserialization
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.
Vulnerability Analysis
CVE-2026-56304 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is a Marshaling, Unmarshaling Vulnerability?
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
CVE-2026-56304 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
Products Associated with CVE-2026-56304
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Affected Versions
picklescan:- Before 1.0.1 is affected.
- Version 1.0.1 is unaffected.