Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-79675

CVE-2026-79675CRITICAL

NLTK before 3.10.3 JVM Argument Injection via Per-Call Options

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   H   H   H    9.3   .0077   54.2     —

AFFECTED
  Product  Versions     Fixed
  nltk     unspecified  3.10.3

TIMELINE
  Aug 25  Reserved by VulnCheck
  Aug 25  Published (CNA: VulnCheck)
  Sep 1   EXPLOIT PUBLISHED — CVE-2026-79675 (nltk). Public exploit reference added.

CWE-88 · CNA: VulnCheck · CVSS v4.0 · 2 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 25, 2026	Reserved	Reserved by VulnCheck
August 25, 2026	Published	Published (CNA: VulnCheck)
September 1, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-79675 (nltk). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
nltk	nltk	—	—	3.10.3

Weaknesses

CWE-88

References (2)

https://github.com/nltk/nltk/security/advisories/GHSA-m4rf-3fr8-xwx3 [Exploit, Mitigation, Vendor Advisory]
https://www.vulncheck.com/advisories/nltk-before-jvm-argument-injection-via-per-call-options [Third Party Advisory]

Authoritative record: CVE-2026-79675 at cve.org

Vendors: nltk

Weaknesses: CWE-88

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-79675 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.