CVE-2026-9689: Red Hat Build Of Keycloak

Medium severity, CVSS 4.2. EPSS: 0.4% chance of exploitation in the next 30 days.

A flaw was found in Keycloak, an open-source identity and access management solution. When a client application is configured to accept broad redirect Uniform Resource Identifiers (URIs), a remote attacker can manipulate the authentication process by crafting a special web address. If a user clicks this link, the client application might incorrectly prioritize attacker-controlled information over legitimate data. This vulnerability, known as HTTP parameter pollution, could allow an attacker to bypass security measures or gain unauthorized access to resources.

Affected products

• Red Hat Build Of Keycloak: affected versions not specified

Published 2026-05-27. Last modified 2026-08-20.