{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-126304","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-10T20:16:44.443Z","datePublished":"2026-11-13T09:36:23.105Z","dateUpdated":"2026-11-13T09:36:23.105Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-13T09:36:23.105Z"},"datePublic":"2026-10-26T00:00:00.000Z","title":"NLTK 3.10.0 before 3.10.4 Symlink Escape in YCOECorpusReader","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Improper Link Resolution Before File Access ('Link Following')","cweId":"CWE-59","type":"CWE"}]}],"affected":[{"vendor":"nltk","product":"nltk","defaultStatus":"unaffected","packageURL":"pkg:pypi/nltk","versions":[{"version":"3.10.0","status":"affected","versionType":"semver","lessThan":"3.10.4"},{"version":"3.10.4","status":"unaffected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10.0","versionEndExcluding":"3.10.4"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/nltk/nltk/security/advisories/GHSA-qg35-44qx-7vrr","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-qg35-44qx-7vrr)"},{"name":"VulnCheck Advisory: NLTK 3.10.0 before 3.10.4 Symlink Escape in YCOECorpusReader","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/nltk-3.10.0-before-3.10.4-symlink-escape-in-ycoecorpusreader"}],"credits":[{"lang":"en","value":"manus-pi","type":"reporter"},{"lang":"en","value":"manus-use","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}}}}