---
cve: "CVE-2026-79675"
severity: "CRITICAL"
cvss: 9.3
epss: "0.8%"
vendor: "nltk"
kev: false
exploited: false
published: "2026-08-25 15:16:00"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-11-09T05:41:23+01:00"
---

# CVE-2026-79675

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

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.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-08-27 16:24:50
- CNA-CVSS: **9.3** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **yes**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Schwachstellen-Klasse

- **CWE-88** — Improper Neutralization of Argument Delimiters in a Command
  The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string.

## Angriffsmuster (CAPEC)

- [CAPEC-41 — Using Meta-characters in E-mail Headers to Inject Malicious Payloads](https://capec.mitre.org/data/definitions/41.html) _(Severity: High)_
- [CAPEC-88 — OS Command Injection](https://capec.mitre.org/data/definitions/88.html) _(Severity: High)_
- [CAPEC-137 — Parameter Injection](https://capec.mitre.org/data/definitions/137.html) _(Severity: Medium)_
- [CAPEC-174 — Flash Parameter Injection](https://capec.mitre.org/data/definitions/174.html) _(Severity: Medium)_
- [CAPEC-460 — HTTP Parameter Pollution (HPP)](https://capec.mitre.org/data/definitions/460.html) _(Severity: Medium)_

## Patch verfügbar (OSV)

- 303f6e2ba8e4548a5f54fd65d86bb5c9a949f1db (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-79675/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_