{"cve":"CVE-2026-65915","nvd":{"published":"2026-08-22T15:16:19.500","modified":"2026-10-14T13:10:00.187","status":"Analyzed","description":"NLTK versions before 3.10.0 contain a logic bug in FileSystemPathPointer.open() where the sandbox validation check compares a normalized path against itself, making the security check permanently inert. Attackers can pass file:// URLs to nltk.data.load() to read arbitrary files accessible to the process user, including credentials and configuration files.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":7.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-284"],"references":["https://github.com/nltk/nltk/security/advisories/GHSA-72r2-7mfr-5xr9","https://www.vulncheck.com/advisories/nltk-before-arbitrary-file-read-via-filesystempathpointer","https://github.com/nltk/nltk/security/advisories/GHSA-72r2-7mfr-5xr9"],"products":["nltk:nltk"],"source":"nvd","synced_at":"2026-10-19T22:49:38.260478770+00:00"},"epss":{"cve":"CVE-2026-65915","score":0.0041,"percentile":0.34987,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-72r2-7mfr-5xr9","url":"https://osv.dev/vulnerability/GHSA-72r2-7mfr-5xr9","summary":"NLTK: FileSystemPathPointer.open() sandbox check is dead code — arbitrary file read via file:// protocol","modified":"2026-09-08T15:46:56.329043767Z","packages":[{"ecosystem":"PyPI","name":"nltk","purl":"pkg:pypi/nltk","ranges":["<3.10.0"],"fixed":["3.10.0"]}]},{"id":"PYSEC-2026-3731","url":"https://osv.dev/vulnerability/PYSEC-2026-3731","summary":"","modified":"2026-09-01T09:15:03.471501849Z","packages":[{"ecosystem":"PyPI","name":"nltk","purl":"pkg:pypi/nltk","ranges":["<3.10.0"],"fixed":["3.10.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}