{"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"],"vendor":"nltk","product":"nltk","affected":["nltk >= 3.10.0, < 3.10.2"],"patched":["nltk 3.10.2"],"published":"2026-08-22","updated":"2026-10-14","sourceUpdated":"2026-10-14T13:10:00.187","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"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62383.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-62383"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2521332"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-62383"}],"tags":["nvd","ghsa","pip","osv","csaf","vex","red-hat"],"epss":0.00183,"epssPercentile":0.07783,"aliases":["GHSA-3hhw-38pf-pxj6","PYSEC-2026-3726"],"ecosystem":"pip","ingestedAt":"2026-08-23T04:42:15.124Z","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## Affected\n\n- `nltk >= 3.10.0, < 3.10.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `nltk 3.10.2`\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\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62383.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}