What is GHSA-gf32-cmjh-8m9v?

GHSA-gf32-cmjh-8m9v is a security advisory published by GitHub Security Advisories with Critical severity. Duplicate Advisory: NLTK: Missing Post-Download Integrity Verification Allows Malicious Package Injection

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.

Which products are affected by GHSA-gf32-cmjh-8m9v?

GHSA-gf32-cmjh-8m9v affects 1 product, including: pip/nltk:\u003c= 3.9.2.

⚠ Withdrawn by GitHub Security Advisories

Withdrawn: September 9, 2026

GHSA-gf32-cmjh-8m9vCriticalCVSS 7.1

Duplicate Advisory: NLTK: Missing Post-Download Integrity Verification Allows Malicious Package Injection

Vendor

GitHub Security Advisories

Published

August 22, 2026

Last Modified

September 9, 2026

🔗 CVE IDs covered (1)

CVE-2026-63310 →

📋 Description

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-5wp5-5229-5g6q. This link is maintained to preserve external references.

Original 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.

🎯 Affected products1

pip/nltk:<= 3.9.2

🔗 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