CVE-2026-42280
HIGH7.1EPSS 0.03%Auth.js SDK has Improper Permission Checking
Published: 5/6/2026Modified: 5/6/2026
Description
### Description 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. ### Am I Affected? Users are affected if they meet each of the following preconditions: - Applications built using Auth0.js version between 8.11.0 and 9.32.0 - The application’s access control relies on rules defined in Auth0 Actions. ### Affected product and versions auth0.js SDK v8.11.0 to v9.32.0 ### Resolution Upgrade auth0/auth0.js to v10.0.0 or greater. ### Acknowledgements Okta would like to thank Quan Le (@aleister1102) for their discovery and responsible disclosure.
Affected packages (1)
- npm/auth0-js>= 8.11.0, < 10.0.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |