{"affected":[{"defaultStatus":"unaffected","ecosystem":"pypi","packageName":"nltk","product":"nltk","source":"CNA: VulnCheck","vendor":"nltk","versions":[{"lessThan":"3.10.4","status":"affected","version":"3.9.4","versionType":"semver"},{"status":"unaffected","version":"3.10.4","versionType":"semver"}]}],"cveId":"CVE-2026-126302","cwes":["CWE-59"],"description":"NLTK from 3.9.4 before 3.10.4 contains a symlink following vulnerability in nltk.sem.chat80.sql_query() that bypasses the pathsec data-root sandbox containment check. Attackers who can write into a trusted NLTK data root can plant a symbolic link to read SQLite databases outside the sandbox.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":4.8,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":3.3,"severity":"low","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},{"score":4.8,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/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","version":"4.0"},{"score":3.3,"severity":"low","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}],"modifiedAt":1794565055410,"publishedAt":1794562584559,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/nltk/nltk/security/advisories/GHSA-xmfg-f9cm-w86q"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/nltk-3.9.4-before-3.10.4-symlink-sandbox-escape-via-chat80-sql-query"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/nltk/nltk/security/advisories/GHSA-xmfg-f9cm-w86q"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/nltk-3.9.4-before-3.10.4-symlink-sandbox-escape-via-chat80-sql-query"}],"remediation":[],"revision":"5f6f7e8f9ec1e85f156e15f2e3e6aefd841797d87e34ed0c0443b721b0d8d5d1","sources":[{"modifiedAt":1794562584559,"name":"CNA: VulnCheck","retrievedAt":1794564586617,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126302"},{"modifiedAt":1794565055410,"name":"NVD","retrievedAt":1794572186270,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126302"}],"ssvc":null,"status":"published","title":"NLTK 3.9.4 before 3.10.4 Symlink Sandbox Escape via chat80.sql_query","updatedAt":1794572186270}