CVE-2026-37978 Keycloak: org.keycloak.services: keycloak: information disclosure via evaluate-scopes admin api
Low-privilege administrators can leak user PII and authorization data via the evaluate-scopes Admin API endpoint.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-37978?
CVE-2026-37978 is a medium-severity vulnerability in Redhat Build of Keycloak, published on 19 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A flaw was found in Keycloak. A low-privilege administrator with the 'view-clients' role can exploit this by invoking the 'evaluate-scopes' Admin API endpoints with an arbitrary user ID (userId) parameter. This vulnerability allows for cross-role personally identifiable information (PII) leakage, enabling unauthorized visibility into user identities and authorizations across the realm. Exploitation is possible remotely via network access to the Admin API.
Weakness: CWE-639
Which versions are affected by CVE-2026-37978?
3 open source packages ship an affected version, including org.keycloak:keycloak-services and keycloak. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.keycloak:keycloak-services Maven | All versions | 26.6.2 |
org.keycloak:keycloak-services Maven | All versions | 26.6.2 |
keycloak Bitnami | All versions | 26.4.12 |
Products include Redhat Build of Keycloak.
How do I fix CVE-2026-37978?
Upgrade org.keycloak:keycloak-services to 26.6.2 or later.
Is CVE-2026-37978 being exploited?
There is no known exploitation of CVE-2026-37978 in the wild and no public exploit code.
Other vulnerabilities in Redhat Build of Keycloak
- CVE-2026-15572 Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation
- CVE-2026-3047 Keycloak SAML Broken has Authentication Bypass by Primary Weakness
- CVE-2026-15573 Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher
- CVE-2026-16102 Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers
- CVE-2026-1609 Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users
Sources
Also known as BIT-keycloak-2026-37978, ECHO-e419-5755-0224, GHSA-rrv7-3mqf-hxfr, MINI-3444-357q-3jx2, MINI-m26c-jrm7-jp83.