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Medium · 5.3 CVE-2026-107370 EUVD-2026-100482

Improper Request Handling for Active Directory Logins in auth0-lock

Published Oct 13, 2026 · Updated Oct 14, 2026 · Assigned by Okta

Description

When a username for an Active Directory connection is a domain without a local part, the auth0-lock library initiates the authentication transaction with a GET request instead of a POST request. As a result, user-submitted form data is appended to the URL as query string parameters.

Affected products

VendorProductAffectedFixed
Auth0 auth0-lock 10.9.0 – < 13.2.1, 14.0.0 – < 15.0.2 13.2.1

References