GitHub Advisoryadvisory · Maven
GHSA-rrv7-3mqf-hxfr Keycloak: Information Disclosure via evaluate-scopes Admin API
MEDIUM
Official page ↗
- Aliases
- CVE-2026-37978
- Ecosystem
- Maven
- Packages
- org.keycloak:keycloak-services
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
- Weaknesses
- CWE-639
- Reviewed
- 2026-06-04
Affected packages
• Maven org.keycloak:keycloak-services: < 26.6.2 → fixed in 26.6.2
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.
Related
Alias · CVE (1)
- CVE-2026-37978 A flaw was found in Keycloak. vulnerability
Weakness · CWE (1)
- CWE-639 Authorization Bypass Through User-Controlled Key weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-37978 advisory
- https://github.com/keycloak/keycloak/commit/492d1f04cdad425dadb9d5e1faa94dd17a875573 web
- https://github.com/keycloak/keycloak/commit/ba9a18744dcec2ef46f284d25c1c0aa1c962a500 web
- https://access.redhat.com/errata/RHSA-2026:19596 web
- https://access.redhat.com/errata/RHSA-2026:19597 web
- https://access.redhat.com/security/cve/CVE-2026-37978 web
- https://bugzilla.redhat.com/show_bug.cgi?id=2455327 web
- https://github.com/keycloak/keycloak package