CVE-2026-96547
Keycloak-services: keycloak-services: dcr registration-time claim-path gap allows forging realm_access.roles
What happened?
A flaw was found in the Dynamic Client Registration component of Keycloak, an open-source identity and access management solution. The issue occurs because the system does not properly restrict which claim names can be used when setting up new clients. An attacker with valid registration credentials could create a client that incorrectly maps standard user profile information to sensitive security roles, potentially allowing them to gain unauthorized privileges on external applications that trust Keycloak tokens.
Affected software and versions
| Software | Version information | Fixed version |
|---|---|---|
| keycloak-rhel9-containerRed Hat | unaffected: 26.4-29 to < * | See vendor advisory |
| keycloak-rhel9-operator-bundle-containerRed Hat | unaffected: 26.4.17-2 to < * | See vendor advisory |
| keycloak-rhel9-operator-containerRed Hat | unaffected: 26.4-30 to < * | See vendor advisory |
| keycloak-servicesRed Hat | Default status: unaffected | See vendor advisory |
| rhbk/keycloak-rhel9Red Hat | Default status: unaffected | See vendor advisory |
| keycloak-servicesRed Hat | Default status: unaffected | See vendor advisory |
Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.
Is it being exploited?
This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.
How to respond
- Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
- Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
- Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.