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-2026-62384

CVE-2026-62384HIGH

NLTK FramenetCorpusReader Symlink Sandbox Bypass before 3.10.2

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   H   N   N    8.7   .0065   49.4     —

AFFECTED
  Product  Versions  Fixed
  nltk     3.10.0 –  3.10.2

TIMELINE
  Jul 13  Reserved by VulnCheck
  Aug 22  Published (CNA: VulnCheck)
  Sep 2   EXPLOIT PUBLISHED — CVE-2026-62384 (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 sandbox bypass in FramenetCorpusReader that allows attackers to read arbitrary XML files outside the corpus root. Attackers can place symlinks with names containing no path separators inside the corpus subdirectory, which pass the path validation guard and are resolved to files outside the intended corpus root when accessed via frame_by_name(), _lu_file(), or doc() methods.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 13, 2026	Reserved	Reserved by VulnCheck
August 22, 2026	Published	Published (CNA: VulnCheck)
September 2, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-62384 (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-f833-7jw8-xwrv [Exploit, Vendor Advisory]
https://www.vulncheck.com/advisories/nltk-framenetcorpusreader-symlink-sandbox-bypass-before [Third Party Advisory]

Authoritative record: CVE-2026-62384 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-2026-62384 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.