{"id":"GHSA-8qjv-jj2q-x832","summary":"Auth.js SDK has Improper Permission Checking","details":"### Description\nUnder 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.\n\n### Am I Affected?\nUsers are affected if they meet each of the following preconditions:\n- Applications built using Auth0.js version between 8.11.0 and 9.32.0\n- The application’s access control relies on rules defined in Auth0 Actions.\n\n\n### Affected product and versions\nauth0.js SDK v8.11.0 to v9.32.0\n\n### Resolution\nUpgrade auth0/auth0.js to v10.0.0 or greater.\n\n### Acknowledgements\nOkta would like to thank Quan Le (@aleister1102) for their discovery and responsible disclosure.","aliases":["CVE-2026-42280"],"modified":"2026-06-08T23:45:14.633172068Z","published":"2026-05-06T17:05:14Z","database_specific":{"github_reviewed_at":"2026-05-06T17:05:14Z","nvd_published_at":"2026-05-27T15:16:27Z","cwe_ids":["CWE-863"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","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"},{"type":"PACKAGE","url":"https://github.com/auth0/auth0.js"}],"affected":[{"package":{"name":"auth0-js","ecosystem":"npm","purl":"pkg:npm/auth0-js"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.11.0"},{"fixed":"10.0.0"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 9.32.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-8qjv-jj2q-x832/GHSA-8qjv-jj2q-x832.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N"}]}