CVE-2026-4630
Medium
Description
A flaw was found in Keycloak. An authenticated client could exploit an Insecure Direct Object Reference (IDOR) vulnerability in the Authorization Services Protection API endpoint. By knowing or obtaining a resource's unique identifier (UUID) belonging to another Resource Server within the same realm, the client could bypass authorization checks. This allows the client to perform unauthorized GET, PUT, and DELETE operations on resources, leading to information disclosure and potential unauthorized modification or deletion of data.
SeverityMedium
CVSS6.8
Exploit probability—
Product
Redhat Build Of Keycloak
PublishedMay 19, 2026
First seenMay 19, 2026
How to fix
Update
- redhat build_of_keycloak26.4.12 or later
- org.keycloak:keycloak-services26.6.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redhat build_of_keycloak | 26.4 ≤ v < 26.4.12 | 26.4.12 |
| org.keycloak:keycloak-servicesMaven | v < 26.6.2 | 26.6.2 |
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