En bref
- CVE-2026-0848 est une vulnérabilité CRITIQUE (CVSS 10.0) touchant nltk, nltk (nltk).
- Probabilité d'exploitation dans les 30 prochains jours (EPSS) : 0.84%, plus élevée que 57.9% des vulnérabilités.
- Correctif : mettre à jour vers 3.9.3 ou plus récent.
| Package | Affected versions | Patched versions |
|---|
| nltk PyPI | < 3.9.3
| 3.9.3
|
| nltk | ≤ 3.9.2
| No fix yet |
Description
NLTK versions <=3.9.2 are vulnerable to arbitrary code execution due to improper input validation in the StanfordSegmenter module. The module dynamically loads external Java .jar files without verification or sandboxing. An attacker can supply or replace the JAR file, enabling the execution of arbitrary Java bytecode at import time. This vulnerability can be exploited through methods such as model poisoning, MITM attacks, or dependency poisoning, leading to remote code execution. The issue arises from the direct execution of the JAR file via subprocess with unvalidated classpath input, allowing malicious classes to execute when loaded by the JVM.
NVD description
NLTK versions <=3.9.2 are vulnerable to arbitrary code execution due to improper input validation in the StanfordSegmenter module. The module dynamically loads external Java .jar files without verification or sandboxing. An attacker can supply or replace the JAR file, enabling the execution of arbitrary Java bytecode at import time. This vulnerability can be exploited through methods such as model poisoning, MITM attacks, or dependency poisoning, leading to remote code execution. The issue arises from the direct execution of the JAR file via subprocess with unvalidated classpath input, allowing malicious classes to execute when loaded by the JVM.
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