What is CVE-2026-79674?

CVE-2026-79674 is a high-severity vulnerability in Nltk, classified under External Control of File Name or Path. CVSS score: 8.2/10. Published 2026-08-25.

How severe is CVE-2026-79674?

High severity. CVSS v3 base score is 8.2 out of 10.

Vulnerability in Nltk

CVE-2026-79674

NLTK versions before 3.10.3 contain a path sandbox bypass vulnerability in corpus-reader constructors that allows attackers to read files outside the intended data root. Attackers can supply arbitrary corpus root paths to LinThesaurusCorpusReader and PanLexLiteCorpusReader constructors to access filesystem content and SQLite databases outside the pathsec sandbox boundary.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.

Affected products

Nltk

Weakness classification (CWE)

CWE-73 — External Control of File Name or Path

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-79674?: CVE-2026-79674 is a high-severity vulnerability in Nltk, classified under External Control of File Name or Path. CVSS score: 8.2/10. Published 2026-08-25.
How severe is CVE-2026-79674?: High severity. CVSS v3 base score is 8.2 out of 10.