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…
Critical CVSS 9.8
Summary
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, ye…
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Affected products
- :
Sources
- NVD DATABASE
Original Links
- https://github.com/bohmiiidd/Undocumented-RCE-in-PLY Exploit
- https://github.com/bohmiiidd/Undocumument_RCE_PLY-yacc-CVE-2025-56005 Exploit
- https://github.com/tom025/ply_exploit_rejection Exploit
- https://github.com/tom025/ply_exploit_rejection/issues/1
- http://www.openwall.com/lists/oss-security/2026/01/23/4 Exploit
- http://www.openwall.com/lists/oss-security/2026/01/23/5 Mailing List
- http://www.openwall.com/lists/oss-security/2026/01/28/5 Exploit
- http://www.openwall.com/lists/oss-security/2026/01/29/1 Exploit
- http://www.openwall.com/lists/oss-security/2026/01/29/2 Mailing List
- http://www.openwall.com/lists/oss-security/2026/01/30/1
- https://access.redhat.com/security/cve/CVE-2025-56005
- https://bugzilla.redhat.com/show_bug.cgi?id=2431308
- https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-56005.json
Timeline
- nvd_ingest NVD