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Review reviewHigh

CVE-2026-0847

nltk nltk/nltk, Red Hat OpenShift AI 2.25, Red Hat OpenShift AI 3.3

A vulnerability in NLTK versions up to and including 3.9.2 allows arbitrary file read via path traversal in multiple CorpusReader classes, including WordListCorpusReader, TaggedCorpusReader, and BracketParseCorpusReader. These classes fail to properly sanitize or validate file paths, enabling attackers to traverse directories and access sensitive files on the server. This issue is particularly critical in scenarios where user-controlled file inputs are processed, such as in machine learning APIs, chatbots, or NLP pipelines. Exploitation of this vulnerability can lead to unauthorized access...

CVSS
7.5
EPSS
0.90%
56.2% percentile
CISA KEV
Not listed
Published
2026.03.05
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.90%
Technical severityCVSS 7.5

Vulnerability overview

A vulnerability in NLTK versions up to and including 3.9.2 allows arbitrary file read via path traversal in multiple CorpusReader classes, including WordListCorpusReader, TaggedCorpusReader, and BracketParseCorpusReader. These classes fail to properly sanitize or validate file paths, enabling attackers to traverse directories and access sensitive files on the server. This issue is particularly critical in scenarios where user-controlled file inputs are processed, such as in machine learning APIs, chatbots, or NLP pipelines. Exploitation of this vulnerability can lead to unauthorized access...

Affected product and versions

Product
nltk nltk/nltk, Red Hat OpenShift AI 2.25, Red Hat OpenShift AI 3.3
Affected versions
>= unspecified <= latest, <= 3.9.2
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that nltk nltk/nltk, Red Hat OpenShift AI 2.25, Red Hat OpenShift AI 3.3 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
CWE-22
CVE-2026-0847 — nltk nltk/nltk, Red Hat OpenShift AI 2.25, Red Hat OpenShift AI 3.3 | SECUFOCUS NOW