CVE-2026-63310
9.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| nltk | nltk | 0 < 3.9.3 | affected |
| nltk | nltk | 3.9.3 | unaffected |
Weaknesses
- CWE-494: Download of Code Without Integrity Check
References
- https://github.com/nltk/nltk/security/advisories/GHSA-5wp5-5229-5g6q
- https://www.vulncheck.com/advisories/nltk-before-missing-post-download-integrity-verification
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