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CVE-2026-12252

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 SHA2
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2aa237b55441c66b5a1bc1f73d03d6e1b6a5164c72d962fd228ab84c8fa00552
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"nltk/nltk","vendor":"nltk","versions":[{"lessThanOrEqual":"latest","status":"affected","version":"unspecified","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:431442a28ebea4bac0e9856385bf2f08b564411ec0a205098e8bb507ed496391 · sha256:3e122899a7f20724… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:431442a28ebea4bac0e9856385bf2f08b564411ec0a205098e8bb507ed496391 · sha256:3e122899a7f20724… · /containers/cna/metrics/0/cvssV3_0

CWE assertions

1 source assertion
{"cweId":"CWE-94","description":"CWE-94 Improper Control of Generation of Code","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:431442a28ebea4bac0e9856385bf2f08b564411ec0a205098e8bb507ed496391 · sha256:3e122899a7f20724… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"url":"https://huntr.com/bounties/f5c93982-0cc9-4e2e-bb85-1b6ab29a2efb"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:431442a28ebea4bac0e9856385bf2f08b564411ec0a205098e8bb507ed496391 · sha256:3e122899a7f20724… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://huntr.com/bounties/f5c93982-0cc9-4e2e-bb85-1b6ab29a2efb"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:431442a28ebea4bac0e9856385bf2f08b564411ec0a205098e8bb507ed496391 · sha256:3e122899a7f20724… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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