What is GHSA-gf32-cmjh-8m9v?

GHSA-gf32-cmjh-8m9v is a security advisory published by GitHub Security Advisories with Critical severity. NLTK before 3.9.3 fails to verify file integrity after downloading packages and before extraction...

Which CVE IDs does GHSA-gf32-cmjh-8m9v cover?

GHSA-gf32-cmjh-8m9v covers the following CVE IDs: CVE-2026-63310. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-gf32-cmjh-8m9v?

GHSA-gf32-cmjh-8m9v has a CVSS v3 base score of 7.1, published by GitHub Security Advisories.

GHSA-gf32-cmjh-8m9vCriticalCVSS 7.1

NLTK before 3.9.3 fails to verify file integrity after downloading packages and before extraction...

Vendor

GitHub Security Advisories

Published

August 22, 2026

Last Modified

August 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-63310 →

📋 Description

NLTK before 3.9.3 fails to verify file integrity after downloading packages and before extraction in the downloader module. Attackers can perform man-in-the-middle attacks or DNS poisoning to inject malicious package contents that are extracted without validation.

🔗 References (4)

https://github.com/nltk/nltk/security/advisories/GHSA-5wp5-5229-5g6q
https://nvd.nist.gov/vuln/detail/CVE-2026-63310
https://www.vulncheck.com/advisories/nltk-before-missing-post-download-integrity-verification
https://github.com/advisories/GHSA-gf32-cmjh-8m9v