En bref
- CVE-2026-12252 est une vulnérabilité ÉLEVÉE (CVSS 7.8) touchant nltk, nltk (nltk).
- Probabilité d'exploitation dans les 30 prochains jours (EPSS) : 0.19%, plus élevée que 9.2% des vulnérabilités.
- Correctif : mettre à jour vers 3.9.4 ou plus récent.
| Package | Affected versions | Patched versions |
|---|
| nltk PyPI | < 3.9.4
| 3.9.4
|
| nltk | ≤ 3.9.3
| No fix yet |
Description
In nltk/nltk versions 3.9.3 and earlier, five Stanford interface classes (StanfordPOSTagger, StanfordNERTagger, StanfordParser, StanfordDependencyParser, and StanfordNeuralDependencyParser) are vulnerable to untrusted JAR code execution. These classes accept user-controllable JAR paths and execute them via the java() function, which invokes subprocess.Popen() without integrity verification. This vulnerability is identical to CVE-2026-0848, which was fixed for StanfordSegmenter by adding SHA256 verification. However, the fix was not applied to these additional classes, leaving them susceptible to arbitrary code execution when loading untrusted JAR files.
NVD description
In nltk/nltk versions 3.9.3 and earlier, five Stanford interface classes (StanfordPOSTagger, StanfordNERTagger, StanfordParser, StanfordDependencyParser, and StanfordNeuralDependencyParser) are vulnerable to untrusted JAR code execution. These classes accept user-controllable JAR paths and execute them via the `java()` function, which invokes `subprocess.Popen()` without integrity verification. This vulnerability is identical to CVE-2026-0848, which was fixed for StanfordSegmenter by adding SHA256 verification. However, the fix was not applied to these additional classes, leaving them susceptible to arbitrary code execution when loading untrusted JAR files.
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