Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-63310
NLTK before 3.9.3 Missing Post-Download Integrity Verification
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV
N L N N N H H H 9.3 .0012 1.8 —
AFFECTED
Product Versions Fixed
nltk unspecified 3.9.3
TIMELINE
Jul 16 Reserved by VulnCheck
Aug 22 Published (CNA: VulnCheck)
Aug 31 EXPLOIT PUBLISHED — CVE-2026-63310 (nltk). Public exploit reference added.
Sep 14 REJECTED — CVE-2026-63310 (nltk). Record withdrawn by the CNA.
Description
This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| July 16, 2026 | Reserved | Reserved by VulnCheck |
| August 22, 2026 | Published | Published (CNA: VulnCheck) |
| August 31, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-63310 (nltk). Public exploit reference added. |
| September 14, 2026 | REJECTED | REJECTED — CVE-2026-63310 (nltk). Record withdrawn by the CNA. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| nltk | nltk | — | — | 3.9.3 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-63310 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
