CVE-2026-93999 Keycloak-services: keycloak-services: token refresh continues issuing tokens for disabled audience clients
Attackers with valid refresh tokens can obtain access tokens for disabled clients, bypassing administrative access controls in Keycloak.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-93999?
CVE-2026-93999 is a medium-severity missing authorization vulnerability in Red Hat Build of Keycloak, published on 19 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in the OIDC protocol implementation of Keycloak, an open-source identity and access management solution. The issue occurs during the token refresh process when the server restores requested audiences from stored client IDs. Keycloak fails to verify if the target audience client is still enabled before issuing a new access token. This allows an application with an existing refresh token to continue obtaining valid access tokens for a disabled client, potentially bypassing administrative access controls for resource servers that rely on offline JWT validation.
Weakness: CWE-862
Which versions are affected by CVE-2026-93999?
How do I fix CVE-2026-93999?
No fix has been published for CVE-2026-93999 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-93999 being exploited?
There is no known exploitation of CVE-2026-93999 in the wild and no public exploit code.
Sources
Also known as GHSA-82wc-7jr6-wxgm.