{"schema":"threatline.record/2","record":{"id":"CVE-2026-109956","aliases":["GHSA-j456-xh4h-cpf2"],"summary":"NLTK through 3.10.3 Path Traversal via WekaClassifier Model Path","details":"NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the model_filename or model argument can make the weka JVM write files via -d or probe files via -l outside allowed data roots.","categories":["Unclassified"],"product":"nltk","vendor":"nltk","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109956","source_modified_at":"2026-10-13T13:27:20.244Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"nltk","vendor":"nltk","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"3.10.3"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.3,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00318,"percentile":0.23479,"score_date":"2026-10-23"},"published_at":"2026-10-13T13:27:20.244Z","modified_at":"2026-10-13T13:27:20.244Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-109956","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-13T13:27:20.244Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-109956","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/nltk/nltk/security/advisories/GHSA-j456-xh4h-cpf2","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/nltk-through-3.10.3-path-traversal-via-wekaclassifier-model-path","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-13T13:27:20.244Z","content_hash":"5490231c3fe35f09d9cd933dd67469c04d6e68e15a0141e5c53baf87a23b336f"}}