CVE-2026-42280
Improper Permission Checking in Auth.js SDK
CVSS Score
7.1
EPSS Score
0.0%
EPSS Percentile
9th
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.
| CWE | CWE-863 |
| Vendor | auth0 |
| Product | auth0.js |
| Published | May 27, 2026 |
| Last Updated | May 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
Affected Versions
auth0 / auth0.js
>= 8.11.0 , <= 9.32.0