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01
Record
STATE: —
02
Description
SRC: CNA
03
Metadata
SCHEMA: CVE JSON 5
04
Affected products
PAIRS: —
05
References
REFS: —
01
Record
STATE: PUBLISHED
CVE-2026-63310
NLTK before 3.9.3 Missing Post-Download Integrity Verification
Critical
PUBLISHED
CNA: VulnCheck
Base score
9.3
CVSS v4.0
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
View raw JSON
CVE Program record
02
Description
CNA: VulnCheck
NLTK before 3.9.3 Missing Post-Download Integrity Verification
03
Metadata
SCHEMA: 5.2
Published
2026-08-22 14:12Z
2 HR AGO
Last updated
2026-08-22 14:12Z
2 HR AGO
Reserved
2026-07-16
Assigning CNA
VulnCheck
Record state
PUBLISHED
Severity
Critical (CVSS 9.3)
CVSS vector
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
Weaknesses
CWE-494
Download of Code Without Integrity Check
Base
SSVC decision
No CISA-ADP assessment
Data version
5.2
Document digest
7a1b2e42214d7d0fcf2521cbe4f903468203fa3e5df6970f48d69e85acbeaedf
04
Affected products
PAIRS: 1
Vendor
Product
Versions
Platforms
nltk
nltk
0 to < 3.9.3
—
05
References
REFS: 2
github.com
GitHub Security Advisory (GHSA-5wp5-5229-5g6q)
https://github.com/nltk/nltk/security/advisories/GHSA-5wp5-5229-5g6q
vendor-advisory
www.vulncheck.com
VulnCheck Advisory: NLTK before 3.9.3 Missing Post-Download Integrity Verification
https://www.vulncheck.com/advisories/nltk-before-missing-post-download-integrity-verification
third-party-advisory