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.
Mitigation
Minimal update. May introduce new vulnerabilities or breaking changes.
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 debian 11 | | =3.10.0-1 || =3.10.1-1 || =3.10.3-1 || =3.5-1 || =3.6.5-1 || =3.6.7-1 || =3.7-1 || =3.8-1 || =3.8.1-1 || =3.9.1-1 || =3.9.1-2 || =3.9.2-1 || =3.9.3-1 | - |
debian 13 | | =3.10.0-1 || =3.10.1-1 || =3.10.3-1 || =3.9.1-2 || =3.9.2-1 || =3.9.3-1 | - |
debian 14 | | =3.10.0-1 || =3.10.1-1 || =3.9.1-2 || =3.9.2-1 || =3.9.3-1 || >=0 <3.10.3-1 | 3.10.3-1 |
debian 12 | | =3.10.0-1 || =3.10.1-1 || =3.10.3-1 || =3.8-1 || =3.8.1-1 || =3.9.1-1 || =3.9.1-2 || =3.9.2-1 || =3.9.3-1 | - |
 pypi | | =0.8 || =0.9 || =0.9.3 || =0.9.4 || =0.9.5 || =0.9.6 || =0.9.7 || =0.9.8 || =0.9.9 || =2.0.1 || =2.0.1rc1 || =2.0.1rc2-git || =2.0.1rc3 || =2.0.1rc4 || =2.0.2 || =2.0.3 || =2.0.4 || =2.0.5 || =2.0b4 || =2.0b5 || =2.0b6 || =2.0b7 || =2.0b8 || =2.0b9 || =3.0.0 || =3.0.0b1 || =3.0.0b2 || =3.0.1 || =3.0.2 || =3.0.3 || =3.0.4 || =3.0.5 || =3.1 || =3.2 || =3.2.1 || =3.2.2 || =3.2.3 || =3.2.4 || =3.2.5 || =3.3 || =3.4 || =3.4.1 || =3.4.2 || =3.4.3 || =3.4.4 || =3.4.5 || =3.5 || =3.5b1 || =3.6 || =3.6.1 || =3.6.2 || =3.6.3 || =3.6.4 || =3.6.5 || =3.6.6 || =3.6.7 || =3.7 || =3.8 || =3.8.1 || =3.9 || =3.9.1 || =3.9.2 || =3.9.3 || =3.9b1 || >=0 <3.9.4 | 3.9.4 |
