{"id":"CVE-2026-62383","title":"nltk versions before 3.10.2 contain a symlink-based arbitrary file read vulnerability in IPIPANCorpusReader methods that bypass nltk.pathsec validation entirely","summary":"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 arbitra…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-22","CWE-59"],"published":"2026-08-22","updated":"2026-08-22","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-62383","references":[{"url":"https://github.com/nltk/nltk/security/advisories/GHSA-3hhw-38pf-pxj6","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/nltk-ipipancorpusreader-symlink-arbitrary-file-read","label":"disclosure@vulncheck.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62383"},{"url":"https://github.com/nltk/nltk/pull/3727"},{"url":"https://github.com/nltk/nltk/commit/ee1a42e51982c4dce6ad3ee77ff1ac43894288ab"},{"url":"https://github.com/nltk/nltk/releases/tag/v3.10.2"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2026-3726.yaml"},{"url":"https://github.com/advisories/GHSA-3hhw-38pf-pxj6"},{"url":"https://github.com/nltk/nltk"}],"tags":["nvd","ghsa","pip","osv"],"ingestedAt":"2026-08-23T04:42:15.124Z","epss":0.00185,"epssPercentile":0.08326,"aliases":["GHSA-3hhw-38pf-pxj6","PYSEC-2026-3726"],"ecosystem":"pip","vendor":"nltk","product":"nltk","affected":["nltk >= 3.10.0, < 3.10.2"],"patched":["nltk 3.10.2"],"slug":"CVE-2026-62383","body":"## Overview\n\nnltk 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-62383)\n\nAffected packages:\n\n- `nltk >= 3.10.0, < 3.10.2`\n\nPatched in:\n\n- `nltk 3.10.2`\n\nSource: https://github.com/advisories/GHSA-3hhw-38pf-pxj6","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}