CVE-2026-89298 Information disclosure in Red Hat Build of Keycloak
A read-only administrator can obtain confidential client secrets via the client registration endpoint, potentially leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-89298?
CVE-2026-89298 is a medium-severity vulnerability in Red Hat Build of Keycloak, published on 11 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-200
Which versions are affected by CVE-2026-89298?
How do I fix CVE-2026-89298?
No fix has been published for CVE-2026-89298 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-89298 being exploited?
There is no known exploitation of CVE-2026-89298 in the wild and no public exploit code.
Sources
Also known as GHSA-386r-m7rr-67p4.