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-2026-62383

CVE-2026-62383MEDIUM

nltk IPIPANCorpusReader Symlink Arbitrary File Read

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   L   L   N   L   N   H   N   N    6.8   .0018    7.1     —

AFFECTED
  Product  Versions  Fixed
  nltk     3.10.0 –  3.10.2

TIMELINE
  Jul 13  Reserved by VulnCheck
  Aug 22  Published (CNA: VulnCheck)
  Aug 27  EXPLOIT PUBLISHED — CVE-2026-62383 (nltk). Public exploit reference added.

CWE-22 · CNA: VulnCheck · CVSS v4.0 · 2 references · NVD status: Analyzed

Description

nltk versions before 3.10.2 contain a symlink-based arbitrary file read vulnerability in IPIPANCorpusReader methods that bypass nltk.pathsec validation entirely. Attackers can place a symlink in the corpus root directory and read arbitrary files accessible to the process by calling channels(), domains(), categories(), or fileids() methods with the symlink filename.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 13, 2026	Reserved	Reserved by VulnCheck
August 22, 2026	Published	Published (CNA: VulnCheck)
August 27, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-62383 (nltk). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
nltk	nltk	—	3.10.0	3.10.2

Weaknesses

CWE-22

References (2)

https://github.com/nltk/nltk/security/advisories/GHSA-3hhw-38pf-pxj6 [Exploit, Mitigation, Vendor Advisory]
https://www.vulncheck.com/advisories/nltk-ipipancorpusreader-symlink-arbitrary-file-read [Third Party Advisory]

Authoritative record: CVE-2026-62383 at cve.org

Vendors: nltk

Weaknesses: CWE-22

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-62383 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.