{"affected":[{"defaultStatus":"unaffected","ecosystem":"pypi","packageName":"nltk","product":"nltk","source":"CNA: VulnCheck","vendor":"nltk","versions":[{"lessThan":"3.10.4","status":"affected","version":"3.10.0","versionType":"semver"},{"status":"unaffected","version":"3.10.4","versionType":"semver"}]}],"cveId":"CVE-2026-126304","cwes":["CWE-59"],"description":"NLTK from 3.10.0 before 3.10.4 contains a symlink escape vulnerability in YCOECorpusReader that allows attackers to read files outside the corpus root by planting psd or pos directory symlinks. Attackers controlling a YCOE corpus can make parsed_sents() and tagged_words() return file content from other corpora or temporary files within the NLTK data sandbox.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":7.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},{"score":8.7,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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":7.5,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}],"modifiedAt":1794565055760,"publishedAt":1794562583105,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/nltk/nltk/security/advisories/GHSA-qg35-44qx-7vrr"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/nltk-3.10.0-before-3.10.4-symlink-escape-in-ycoecorpusreader"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/nltk/nltk/security/advisories/GHSA-qg35-44qx-7vrr"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/nltk-3.10.0-before-3.10.4-symlink-escape-in-ycoecorpusreader"}],"remediation":[],"revision":"dae324d117a9ba865aa6a5630584b9f0666e65008ffe61d51a589a4f724c1c9e","sources":[{"modifiedAt":1794562583105,"name":"CNA: VulnCheck","retrievedAt":1794564588843,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126304"},{"modifiedAt":1794565055760,"name":"NVD","retrievedAt":1794572186665,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126304"}],"ssvc":null,"status":"published","title":"NLTK 3.10.0 before 3.10.4 Symlink Escape in YCOECorpusReader","updatedAt":1794572186665}