CVE-2026-126304

HIGH 7.5

NLTK 3.10.0 before 3.10.4 Symlink Escape in YCOECorpusReader

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

NLTK from 3.10.0 before 3.10.4 contains a symlink escape vulnerability in YCOECorpusReader that allows attackers to read files outside the corpus root by planting psd or pos directory symlinks. Attackers controlling a YCOE corpus can make parsed_sents() and tagged_words() return file content from other corpora or temporary files within the NLTK data sandbox.

CWE	CWE-59
Vendor	nltk
Product	nltk
Published	Nov 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

nltk / nltk

3.10.0 < 3.10.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/nltk/nltk/security/advisories/GHSA-qg35-44qx-7vrr vulncheck.com: https://www.vulncheck.com/advisories/nltk-3.10.0-before-3.10.4-symlink-escape-in-ycoecorpusreader

Credits

🔍 manus-pi 🔍 manus-use