PT-2026-38263 · Auth0 · Auth0.Js

Aleister1102 + 1 · Published 2026-05-06 · Updated 2026-06-04 · CVE-2026-42280

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions auth0-js versions 8.11.0 through 9.32.0

Description Improper validation in the Auth0.js SDK may allow the return of user profile data when a specifically crafted invalid ID token is used in conjunction with a valid access token. This issue occurs in applications where access control relies on rules defined in Auth0 Actions, potentially leading to unauthorized information disclosure.

Recommendations Update auth0-js to version 10.0.0 or greater.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-42280

GHSA-8QJV-JJ2Q-X832

Affected Products

Auth0.Js

References · 6

• https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-8qjv-jj2q-x832 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42280 · Security Note
• https://github.com/auth0/auth0.js · Note
• https://twitter.com/UpwindMDR/status/2052089305816838620 · Twitter Post
• https://t.me/cveNotify/166031 · Telegram Post