CVE-2026-79675: JVM argument injection bypass via per-call options in the NLTK Stanford wrappers (incomplete fix of CVE-2026-12841)
Affects gptlineSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 9.8 Critical : upgrade to 1.0.8_23 as a priority.
Data as of 1 Nov 2026, 22:58 UTC
- EPSS
- 0.7% chance of exploitation in 30 days – higher than 55% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.0.8_23
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 2 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 1 Nov 2026.
What to do
Upgrade gptline to 1.0.8_23.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Homebrewgptlinepkg:brew/gptlineOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available that adds validation of JVM options in the per-call java() function, closing the bypass. Users should update to the fixed version of NLTK that includes this patch. Until patched, avoid passing untrusted input to the java_options parameter of the affected Stanford wrapper classes. Do not rely solely on config_java() for JVM option validation, as it does not cover per-call options.
Description
CVE-2026-79675 is a critical vulnerability in the NLTK Stanford Java wrappers where JVM argument injection can bypass the previous fix for CVE-2026-12841. The vulnerability arises because the per-call java() function accepts unvalidated JVM options, allowing dangerous flags to be passed directly to the JVM. This affects four Stanford wrapper classes that accept user-supplied java_options without validation. Exploitation could allow arbitrary code execution via malicious JVM flags. A patch is available that adds validation to the per-call options path.
References
- github.com/nltk/nltk/security/advisories/GHSA-m4rf-3fr8-xwx3 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-79675 (opens in a new tab)
- github.com/nltk/nltk/commit/8fa9650b6009aacfdebbc33d2a08d32c0858ea6c (opens in a new tab)
- github.com/nltk/nltk (opens in a new tab)
- github.com/nltk/nltk/releases/tag/v3.10.3 (opens in a new tab)
- vulncheck.com/advisories/nltk-before-jvm-argument-injection-via-per-call-options (opens in a new tab)