Open-source package vulnerability · PyPI

GHSA-3h2g-j4wp-7qqq: Duplicate Advisory: JVM argument injection bypass via per-call options in the NLTK Stanford wrappers (incomplete fix of CVE-2026-12841)

criticalCVSS 4.0 9.3 · 3.1 9.8

This advisory was withdrawn on Sep 1, 2026. The publisher no longer considers it a valid vulnerability.

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-m4rf-3fr8-xwx3. This link is maintained to preserve external references. Original Description NLTK before 3.10.3 fails to validate JVM options passed through the per-call options parameter in the java() function, allowing attackers to inject dangerous JVM flags.

Published Aug 25, 2026 · Updated Sep 1, 2026

Affected packages

nltk

Ecosystem: PyPI
Affected: <= 3.10.2
Fixed in: No patched version yet
Check: pip show nltk

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-m4rf-3fr8-xwx3. This link is maintained to preserve external references.

Original Description

NLTK before 3.10.3 fails to validate JVM options passed through the per-call options parameter in the java() function, allowing attackers to inject dangerous JVM flags. Attackers can supply malicious options like -agentpath, -javaagent, or @argfile to Stanford wrapper classes to achieve arbitrary code execution.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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