Description
A flaw was found in Keycloak. The User-Managed Access (UMA) 2.0 Protection API endpoint for permission tickets fails to enforce the `uma_protection` role check. This allows any authenticated user with a token issued for a resource server client, even without the `uma_protection` role, to enumerate all permission tickets in the system. This vulnerability partial leads to information disclosure.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | — | — |
| Red Hat | Red Hat build of Keycloak 26.4.11 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | keycloak-26.4-iamguarded-compat | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.keycloak:keycloak-model-jpa | < 26.5.6 | 26.5.6 | GHSA-q35r-vvhv-vx5h |
| Maven | org.keycloak:keycloak-server-spi-private | < 26.5.6 | 26.5.6 | GHSA-q35r-vvhv-vx5h |
| Maven | org.keycloak:keycloak-services | < 26.5.6 | 26.5.6 | GHSA-q35r-vvhv-vx5h |
Advisories 1
- WID-SEC-2026-0508 Keycloak: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Apr 6, 2026
References
- RHSA-2026:6477 vendor-advisory
- RHSA-2026:6478 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-3190 vdb-entry
- RHBZ#2442572 issue-tracking