| Package | Affected versions | Patched versions |
|---|---|---|
| org.keycloak:keycloak-services | < 26.6.4 | 26.6.4 |
| build of keycloak | ≥ 26.4, < 26.4.13≥ 26.6, < 26.6.4 | 26.4.1326.6.4 |
A flaw was found in Keycloak. A remote attacker with administrative privileges, specifically those with manage-client permission or access to client registration endpoints, could bypass client Uniform Resource Identifier (URI) validation. This is achieved by registering a malicious client with a specially crafted redirect URI using a case-insensitive javascript: or data: scheme. This Cross-Site Scripting (XSS) vulnerability allows for arbitrary code execution in the Keycloak origin when a victim clicks the crafted link, such as in the logout flow or the Admin Console.
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