CVEvulnerability

CVE-2026-12252

7.8 HIGH Published 2026-07-04 Modified 2026-10-25 Official page ↗
Status
Analyzed
Published
2026-07-04
Last modified
2026-10-25
Assigner
[email protected]
CVSS 3.0 ([email protected])
7.8 HIGH — CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weaknesses
CWE-94

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.

Affected configurations

• nltk nltk (<= 3.9.3)

Related

Weakness · CWE (1)

  • CWE-94 Improper Control of Generation of Code weakness

References