CVE-2025-56005
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I. Basic Information for CVE-2025-56005
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
PLY 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PLY是B07个人开发者的一个Python库。 PLY 3.11版本存在安全漏洞，该漏洞源于yacc函数的picklefile参数未经验证地反序列化pickle文件，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | n/a | n/a | - |
II. Public POCs for CVE-2025-56005
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | Arguments to reject CVE-2025-56005 | https://github.com/tom025/ply_exploit_rejection | POC Details |
| 2 | Clarification Regarding the Rejection Arguments | https://github.com/bohmiiidd/Undocumument_RCE_PLY-yacc-CVE-2025-56005 | POC Details |
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Same Patch Batch · n/a · 2026-01-20 · 20 CVEs total
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IV. Related Vulnerabilities
V. Comments for CVE-2025-56005
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