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    CVE-2026-42280

    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.

    Published:May 27, 2026
    Last Modified:Jun 4, 2026
    EPS:May 27, 2026
    EPSS Score:0.00032
    CVSS Score:7.1

    Affected Products

    Vendor
    Auth0
    Product
    Auth0.js

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2020-15125 (CVSS 7.7) — In auth0 (npm package) versions before 2.27.1, a DenyList of specific keys that should be sanitized from the r…
    CVE-2020-5263 (CVSS 5.5) — auth0.js (NPM package auth0-js) greater than version 8.0.0 and before version 9.12.3 has a vulnerability. In t…
    CVE-2018-6873 (CVSS 9.8) — The Auth0 authentication service before 2017-10-15 allows privilege escalation because the JWT audience is not…
    CVE-2018-6874 (CVSS 8.8) — CSRF exists in the Auth0 authentication service through 14591 if the Legacy Lock API flag is enabled.…
    CVE-2018-7307 (CVSS 8.8) — The Auth0 Auth0.js library before 9.3 has CSRF because it mishandles the case where the authorization response…
    CVE-2017-17068 (CVSS 7.5) — A cross-origin vulnerability has been discovered in the Auth0 auth0.js library affecting versions < 8.12. This…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High