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.
Affected products
redhat: build of keycloak
References4
- access.redhat.com/security/cve/CVE-2026-18572 Vendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2509763 Issue TrackingVendor Advisory
- access.redhat.com/errata/RHSA-2026:68277
- access.redhat.com/errata/RHSA-2026:68278
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - EPSS — exploit probability
- 0% percentile: 34 · as of 13 November 2026
- CWE
- CWE-863
Could this be exploited in your environment?
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