PyPI/nltk CVE-2026-12259, CVE-2026-63310: medium 6.5

In nltk version 3.9.4, the `nltk.downloader.Downloader._download_package()` function writes downloaded package bytes to disk and may extract them before enforcing SHA-256 or MD5 checksum validation. T

Action: No fix published. Pin and monitor.

Affected

Fixed versions

No fixed version in the source.

Sources

• osv: PYSEC-2026-4318
• https://huntr.com/bounties/659ccf6d-12d4-4d4a-84c0-078633c35a5d

CVE-2026-12259, CVE-2026-63310 · published 2026-08-03T08:17:17.880Z · modified 2026-10-16T10:56:05.808390648Z · JSON