{"cve":"CVE-2026-62383","nvd":{"published":"2026-08-22T15:16:17.883","modified":"2026-10-14T13:10:00.187","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.","cvss_v4":{"vector":"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","score":6.8},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":5.5},"cwes":["CWE-22"],"references":["https://github.com/nltk/nltk/security/advisories/GHSA-3hhw-38pf-pxj6","https://www.vulncheck.com/advisories/nltk-ipipancorpusreader-symlink-arbitrary-file-read"],"products":["nltk:nltk"],"source":"nvd","synced_at":"2026-10-19T22:49:38.260478770+00:00"},"epss":{"cve":"CVE-2026-62383","score":0.00183,"percentile":0.07782,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-3hhw-38pf-pxj6","url":"https://osv.dev/vulnerability/GHSA-3hhw-38pf-pxj6","summary":"NLTK: Symlink-based arbitrary file read in IPIPANCorpusReader, bypasses nltk.pathsec entirely","modified":"2026-09-08T16:45:03.602432270Z","packages":[{"ecosystem":"PyPI","name":"nltk","purl":"pkg:pypi/nltk","ranges":[">=3.10.0 <3.10.2"],"fixed":["3.10.2"]}]},{"id":"PYSEC-2026-3726","url":"https://osv.dev/vulnerability/PYSEC-2026-3726","summary":"","modified":"2026-08-28T20:30:02.662656980Z","packages":[{"ecosystem":"PyPI","name":"nltk","purl":"pkg:pypi/nltk","ranges":[">=3.10.0 <3.10.2"],"fixed":["3.10.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}