CVE-2026-94217 Keycloak-services: keycloak-services: uma scope merge across resource owners via resource name collision
Attackers can gain unauthorized access to victim resources by exploiting name collisions in Keycloak's UMA permission ticket processing.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-94217?
CVE-2026-94217 is a low-severity missing authorization vulnerability in Red Hat Build of Keycloak, published on 21 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A flaw was found in the User-Managed Access (UMA) implementation of Keycloak. The issue occurs in the authorization token endpoint when processing permission tickets. If two different users own resources with the same name, the system incorrectly merges the permissions from both resources when one user requests an authorization token. This allows an attacker to gain access scopes on a victim's resource that were never intended to be shared.
Weakness: CWE-862
Which versions are affected by CVE-2026-94217?
How do I fix CVE-2026-94217?
No fix has been published for CVE-2026-94217 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-2026-94217 being exploited?
There is no known exploitation of CVE-2026-94217 in the wild and no public exploit code.
Sources
Also known as GHSA-2cpw-3v2x-mh42.