CVE-2026-37978
MEDIUM EPSS 31.6%
Published May 19, 20261mo ago · Modified Jun 17, 20261w ago
4.9 CVSS 3.1
Published May 19, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N Attack Vector Network
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None
Threat Intelligence
EPSS Exploit Probability
31.6% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-639
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| redhat | build_of_keycloak | * | <26.4.12 |
References 4
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:19596
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:19597
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-37978
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2455327
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.