CVE-2026-42280: AUTH0 AUTH0.JS

High severity, CVSS 7.1. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• AUTH0 AUTH0.JS: from 8.11.0, before 10.0.0 (fixed in 10.0.0)

Published 2026-05-27. Last modified 2026-06-17.