medium4.9
CVE-2026-37978
Keycloak: Information Disclosure via evaluate-scopes Admin API
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.keycloak:keycloak-services | < 26.6.2 | 26.6.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Redhat | Build Of Keycloak | before 26.4.12 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-rrv7-3mqf-hxfr
- https://nvd.nist.gov/vuln/detail/CVE-2026-37978
- https://access.redhat.com/security/cve/CVE-2026-37978
- https://bugzilla.redhat.com/show_bug.cgi?id=2455327
- https://access.redhat.com/errata/RHSA-2026:19597
- https://access.redhat.com/errata/RHSA-2026:19596
- https://github.com/keycloak/keycloak/commit/492d1f04cdad425dadb9d5e1faa94dd17a875573
- https://github.com/keycloak/keycloak/commit/ba9a18744dcec2ef46f284d25c1c0aa1c962a500