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CVE-2025-56005 on CTRL-OS 26.05

Aliases: CVE-2025-56005

Packages: python3Packages.ply

Status: Blocked: No known fix

Advisory Information

An undocumented and unsafe feature in the PLY (Python Lex-Yacc) library 3.11 allows Remote Code Execution (RCE) via the picklefile parameter in the yacc() function. This parameter accepts a .pkl file that is deserialized with pickle.load() without validation. Because pickle allows execution of embedded code via __reduce__(), an attacker can achieve code execution by passing a malicious pickle file. The parameter is not mentioned in official documentation or the GitHub repository, yet it is active in the PyPI version. This introduces a stealthy backdoor and persistence risk. NOTE: A third-party states that this vulnerability should be rejected because the proof of concept does not demonstrate arbitrary code execution and fails to complete successfully.

Updates

2026-07-16 23:28 CEST

Metadata changes:

  • Status for package python3Packages.ply: “Blocked: No known fix”

2026-06-03 17:39 CEST

Metadata changes:

  • Status for package python3Packages.ply: “New”

Comment:

The ply project has been archived and is not updated anymore.

(Amended on: 2026-06-03 17:42 CEST)