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.
Metrics
Affected Vendors & Products
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| Nltk |
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| Nltk |
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References
History
Sat, 04 Jul 2026 04:30:00 +0000
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| First Time appeared |
Nltk
Nltk nltk/nltk |
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| Vendors & Products |
Nltk
Nltk nltk/nltk |
Sat, 04 Jul 2026 01:45:00 +0000
| Type | Values Removed | Values Added |
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| 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. | |
| Title | Untrusted JAR Code Execution in Multiple Stanford Interface Classes in nltk/nltk | |
| Weaknesses | CWE-94 | |
| References |
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| Metrics |
cvssV3_0
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MITRE
Status: PUBLISHED
Assigner: @huntr_ai
Published:
Updated: 2026-07-04T00:58:58.930Z
Reserved: 2026-06-15T08:33:00.274Z
Link: CVE-2026-12252
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
Updated: 2026-07-04T04:15:03Z