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NLTK: Missing Post-Download Integrity Verification Allows Malicious Package Injection
NLTK: Missing Post-Download Integrity Verification Allows Malicious Package Injection
Affected packages
- nltk— before 3.9.3
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://github.com/nltk/nltk/security/advisories/GHSA-5wp5-5229-5g6q
- https://nvd.nist.gov/vuln/detail/CVE-2026-12259
- https://github.com/nltk/nltk/pull/3449
- https://github.com/nltk/nltk/commit/0e26734a61094b628d93e26dc18dd7302567ac46
- https://github.com/nltk/nltk
- https://github.com/nltk/nltk/releases/tag/3.9.3
- https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2026-3729.yaml
- https://huntr.com/bounties/659ccf6d-12d4-4d4a-84c0-078633c35a5d
- https://www.vulncheck.com/advisories/nltk-before-missing-post-download-integrity-verification
Structured record: https://osv.dev/vulnerability/GHSA-5wp5-5229-5g6q
Recommended response stack
Snyk — Scan your dependencies in CI and fix this vulnerability.→Socket — Detect malicious and compromised packages before they ship.→
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