{"id":"CVE-2026-65915","summary":"NLTK before 3.10.0 Arbitrary File Read via FileSystemPathPointer","details":"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.","aliases":["GHSA-72r2-7mfr-5xr9"],"modified":"2026-08-25T03:51:54.302650446Z","published":"2026-08-22T14:12:41.391Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-284"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65915.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65915.json"},{"type":"ADVISORY","url":"https://github.com/nltk/nltk/security/advisories/GHSA-72r2-7mfr-5xr9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-65915"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/nltk-before-arbitrary-file-read-via-filesystempathpointer"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nltk/nltk","events":[{"introduced":"0"},{"fixed":"bd49f9011d7dc8c6a36b3c4ae71f04060c9b3fb9"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.10.0"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v3.10.0-rc1","3.9.4","3.9.3","v3.9.2","3.9.2","3.9.1","3.9","3.8.2","3.8.1","3.8","3.7","3.6.7","3.6.6","3.6.5","3.6.2","3.6.1","3.6","3.5","3.5b1","3.4.4","3.4.3","3.4.1","3.4","3.3","3.2.5","3.2.4","3.2.3","3.2.2","3.2.1","3.2","3.1","3.0.5","3.0.4","3.0.3","3.0.2","3.0.0b1","3.0a4","2.0.1rc4","2.0.1rc3","2.0.1rc2","2.0.1rc1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-65915.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}