CVE-2026-79675

CRITICAL 9.8

NLTK before 3.10.3 JVM Argument Injection via Per-Call Options

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-88
Vendor	nltk
Product	nltk
Published	Aug 25, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

nltk / nltk

0 < 3.10.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/nltk/nltk/security/advisories/GHSA-m4rf-3fr8-xwx3 vulncheck.com: https://www.vulncheck.com/advisories/nltk-before-jvm-argument-injection-via-per-call-options

Credits

🔍 arpitjain099