CVE-2026-37978
Keycloak: Information Disclosure via evaluate-scopes Admin API
4.9
MEDIUM
CVSS 3.1
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.
How to fix CVE-2026-37978
To remediate CVE-2026-37978, upgrade the affected package to a fixed version below.
- —upgrade to 26.6.2 or later
Is CVE-2026-37978 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-37978.
Affected packages (1)
- from 0, < 26.6.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N |