{"id":"CVE-2026-62384","title":"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","summary":"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 i…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-22","CWE-59","CWE-41"],"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-2026-62384","references":[{"url":"https://github.com/nltk/nltk/security/advisories/GHSA-f833-7jw8-xwrv","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/nltk-framenetcorpusreader-symlink-sandbox-bypass-before","label":"disclosure@vulncheck.com"},{"url":"https://github.com/nltk/nltk/security/advisories/GHSA-f833-7jw8-xwrv","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62384"},{"url":"https://github.com/nltk/nltk/pull/3726"},{"url":"https://github.com/nltk/nltk/commit/736d3212a47de2005b85b785dde6720556d3925d"},{"url":"https://github.com/nltk/nltk/releases/tag/v3.10.2"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2026-3789.yaml"},{"url":"https://github.com/advisories/GHSA-f833-7jw8-xwrv"},{"url":"https://github.com/nltk/nltk"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62384.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-62384"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2521349"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-62384"},{"url":"https://access.redhat.com/errata/RHSA-2026:69539"},{"url":"https://access.redhat.com/errata/RHSA-2026:73987"},{"url":"https://access.redhat.com/errata/RHSA-2026:84734"}],"tags":["nvd","ghsa","pip","osv","csaf","vex","red-hat"],"epss":0.00651,"epssPercentile":0.51006,"aliases":["GHSA-f833-7jw8-xwrv","PYSEC-2026-3789"],"ecosystem":"pip","ingestedAt":"2026-08-23T04:42:15.163Z","slug":"CVE-2026-62384","body":"## Overview\n\nNLTK 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.\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-2026-62384)\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-f833-7jw8-xwrv\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Exploit Intelligence, Lightspeed Core, OpenShift Lightspeed, Red Hat Ansible Automation Platform 2, Red Hat OpenShift AI (RHOAI) · no fix planned: Exploit Intelligence, Red Hat Ansible Automation Platform 2, Lightspeed Core, OpenShift Lightspeed, … · updated 2026-10-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62384.json)\n- **RHSA-2026:69539** · Red Hat · fixed in: Red Hat OpenShift AI 3.5 · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69539)\n- **RHSA-2026:73987** · Red Hat · fixed in: Red Hat OpenShift AI 3.3 · released 2026-09-30 · [advisory](https://access.redhat.com/errata/RHSA-2026:73987)\n- **RHSA-2026:84734** · Red Hat · fixed in: Red Hat OpenShift AI 3.4 · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84734)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}