Medium [CVE-2026-18572] Keycloak-services: keycloak-services: uma claim token can override authorization time-policy evaluation attributes
This medium-severity Red Hat Linux advisory covers CVE-2026-18572 affecting Red Hat Build of Keycloak.
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Summary
Keycloak provides authorization services that allow administrators to restrict access to resources based on time policies (for example, only allowing access during business hours). A flaw was discovered where a user can include a fake time value in their authorization request that overrides the actual server time.
This allows the user to bypass these time-based restrictions and access protected resources at unauthorized times.
Affected product named by the advisory: Red Hat Build of Keycloak.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Keycloak provides authorization services that allow administrators to restrict access to resources based on time policies (for example, only allowing access during business hours).
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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