{"id":"CVE-2026-81726","revision":null,"records":[{"revision":"e0a21d891d92423f86dcbd6034ec5755","observedAt":"2026-10-30T11:48:55.079+00:00","statement":{"source":"cve-program","id":"CVE-2026-81726","aliases":[],"title":"NLTK through 3.10.3 Path Traversal via Model-Artifact APIs","description":"NLTK through 3.10.3 contains a path traversal vulnerability in model-artifact APIs that bypass pathsec enforcement by using raw file operations on caller-controlled paths. Attackers can read or write files outside allowed sandbox roots through TransitionParser, AveragedPerceptron, PerceptronTagger, and maxent parameter APIs when pathsec is enabled.","state":0,"publishedAt":"2026-08-27T14:51:18.838+00:00","modifiedAt":"2026-10-30T10:43:25.836+00:00","affected":[{"ecosystem":"Vendor product","name":"nltk","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"nltk\",\n                    \"product\": \"nltk\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:pypi/nltk\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"3.10.3\"\n                        },\n                        {\n                            \"status\": \"unaffected\",\n                            \"version\": \"3.10.4\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N","score":8.3,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L","score":7,"severity":"HIGH"}],"references":["https://github.com/nltk/nltk/security/advisories/GHSA-8mgp-746c-j5xp","https://www.vulncheck.com/advisories/nltk-through-3.10.3-path-traversal-via-model-artifact-apis"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-81726","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-81726","identifiers":["CVE-2026-81726"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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