SB2026050688 - Improper access control in Auth0.js SDK

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Main Vulnerability Database SB2026050688

SB2026050688 - Improper access control in Auth0.js SDK

Published: May 6, 2026

Security Bulletin ID SB2026050688
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper access control (CVE-ID: CVE-2026-42280)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 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


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.


Remediation

Install update from vendor's website.

References