{"id":"CVE-2026-42280","summary":"Improper Permission Checking in Auth.js SDK","details":"Auth0.js is a client-side JavaScript library for Auth0. From 8.11.0 to 9.32.0, under specific preconditions, the Auth0.js SDK may improperly return user profile information using a valid access token when a specifically crafted invalid ID token is provided. This vulnerability is fixed in 10.0.0.","aliases":["GHSA-8qjv-jj2q-x832"],"modified":"2026-07-08T08:02:13.519847362Z","published":"2026-05-27T14:39:15.789Z","database_specific":{"cwe_ids":["CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42280.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42280.json"},{"type":"ADVISORY","url":"https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42280"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/auth0/auth0.js","events":[{"introduced":"50fbf79f858b75ecf7cde344e79586af064d6220"},{"fixed":"5706408161535c9df05349c01dcd578139e280be"}],"database_specific":{"extracted_events":[{"introduced":"8.11.0"},{"last_affected":"9.32.0"},{"fixed":"10.0.0"}],"cpe":"cpe:2.3:a:auth0:auth0.js:*:*:*:*:*:node.js:*:*","source":["AFFECTED_FIELD","CPE_RANGE"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42280.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"}]}