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CVE mentions, exploit signals, and PoC evidence in one fast public view.

CVE detail

CVE-2025-56005

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.

CVSS 9.8 · CriticalBuzz score 54.43 public exploit repository references

Buzz score

Why this CVE is surfacing

Buzz score total 54.4

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 26.4 · diversity 14.5 · KEV 0.0 · OTX 0.0 · PoC 13.5
Mention score
26.4
13 evidence mentions in the snapshot
Diversity score
14.5
5 sources across 2 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
13.5
3 repos · best confidence 0.90
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
13 source links · newest first

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

3 repository references · best confidence 0.90 · max 0 stars
  • tom025/ply_exploit_rejectionHigh confidence
    githubNVD Exploit reference0 starsDiscovered Jul 15, 2026, 3:18 AM

    NVD labels the source link as Exploit; this is not independent verification of the repository's code.

  • bohmiiidd/Undocumument_RCE_PLY-yacc-CVE-2025-56005High confidence
    githubNVD Exploit reference0 starsDiscovered Jul 15, 2026, 3:18 AM

    NVD labels the source link as Exploit; this is not independent verification of the repository's code.

  • bohmiiidd/Undocumented-RCE-in-PLYHigh confidence
    githubNVD Exploit reference0 starsDiscovered Jul 15, 2026, 3:18 AM

    NVD labels the source link as Exploit; this is not independent verification of the repository's code.

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