Improper access control in auth0.js - CVE-2026-42280
Published: May 6, 2026
Vulnerability identifier: #VU130268
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-42280
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: auth0 on WordPress
Affected software:
auth0.js
auth0.js
Detailed vulnerability description
The vulnerability allows a remote user to disclose user profile information.
The vulnerability exists due to improper access control in the Auth0.js SDK when processing a valid access token together with a specifically crafted invalid ID token. A remote user can provide a specifically crafted invalid ID token with a valid access token to disclose user profile information.
Only applications whose access control relies on rules defined in Auth0 Actions are vulnerable.
How to mitigate CVE-2026-42280
Install security update from vendor's website.