CVE-2026-42280 HIGH

CVE-2026-42280: Improper Permission Checking in Auth.js SDK

Vendor Auth0
Product auth0.js
Weakness CWE-863 · Incorrect authorization
Published May 27, 2026
Last update May 28, 2026
View on NVD All CVEs

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 27, 2026 CVE published
May 28, 2026 Record updated