CVE-2026-18572
Keycloak-services: keycloak-services: uma claim token can override authorization time-policy evaluation attributes
- State
- Published
- Severity
- 6.5 Medium
- Published
- Aug 2, 2026
- Updated
- Sep 16, 2026
- Reserved
- Aug 2, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N | redhat |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
Red Hat build of Keycloak 26.6Red Hat |
|
Red Hat build of Keycloak 26.6Red Hat |
|
Red Hat build of Keycloak 26.6Red Hat |
|
Red Hat build of Keycloak 26.6.7Red Hat | |
Red Hat build of Keycloak 26.6.7Red Hat | |
Red Hat build of Keycloak 26.6.7Red Hat | |
Red Hat Data Grid 8Red Hat | |
Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat | |
Red Hat Single Sign-On 7Red Hat |
References
- RHSA-2026:68277vendor-advisory
- RHSA-2026:68278vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-18572vdb-entry
- RHBZ#2509763issue-tracking
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