CVE-2026-97847
Keycloak-services: keycloak-services: client manager can substitute sessionless token principal via hardcoded-claim mappers to obtain realm administrator authority
What happened?
A flaw was found in the protocol mapper and identity resolution components of Keycloak. The issue occurs when a client manager uses hardcoded-claim mappers to override identity claims in sessionless service-account tokens. Because these tokens lack a session ID, Keycloak may incorrectly resolve the token bearer as a different, highly privileged user based on the manipulated claims. This can allow an attacker with limited client management permissions to impersonate a realm administrator and gain full control over the realm.
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.