CVE-2026-62383
nltk IPIPANCorpusReader Symlink Arbitrary File Read
MEDIUM 6.8EPSS 0.2%
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.
- Affected
- nltk
- CVSS v4.0 VULNCHECK
- 6.8 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v4.0 GitHub
- 6.8 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N - CVSS v3.1 VULNCHECK
- 5.5 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - EPSS
- 0.18% chance of exploitation in the next 30 days, 7th percentile
- Published
- 2026-08-22
- Updated
- 2026-08-26
Proof-of-concept exploits (1)
Security advisories
- nltk/nltk/security/advisories/GHSA-3hhw-38pf-pxj6
- https://www.vulncheck.com/advisories/nltk-ipipancorpusreader-symlink-arbitrary-file-read