CVE-2026-89298
Medium
Description
A flaw was found in the Dynamic Client Registration service of Keycloak, an open-source identity and access management solution. The issue occurs when a user with the view-clients role accesses the client registration endpoint to retrieve client details. Due to a failure to mask sensitive information, the service returns the client's confidential secret in cleartext. This could allow a read-only administrator to obtain full access to the affected client's account and potentially escalate their privileges within the realm.
SeverityMedium
CVSS4.9
Exploit probability—
Product
Red Hat Build of Keycloak
PublishedSep 11, 2026
First seenSep 11, 2026
Weakness typeCWE-200Sensitive information exposure
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Red Hat Build of Keycloak | No range specified | — |
| Red Hat Red Hat Single Sign-On 7 | No range specified | — |
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