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CVE-2026-18572— Keycloak-services: keycloak-services: uma claim token can override authorization time-policy evaluation attributes

CVSS 6.5 · Medium EPSS 0.20% · P10

Affected Version Matrix 6

VendorProductVersion RangeStatus
Red HatRed Hat Build of Keycloakanyaffected
anyaffected
anyaffected
Red HatRed Hat Data Grid 8anyunaffected
Red HatRed Hat JBoss Enterprise Application Platform Expansion Packanyunaffected
Red HatRed Hat Single Sign-On 7anyunaffected
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I. Basic Information for CVE-2026-18572

Vulnerability Information
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Vulnerability Title
Keycloak-services: keycloak-services: uma claim token can override authorization time-policy evaluation attributes
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat Build of Keycloak-cpe:/a:redhat:build_keycloak:
Red HatRed Hat Build of Keycloak-cpe:/a:redhat:build_keycloak:
Red HatRed Hat Build of Keycloak-cpe:/a:redhat:build_keycloak:
Red HatRed Hat Data Grid 8-cpe:/a:redhat:jboss_data_grid:8
Red HatRed Hat JBoss Enterprise Application Platform Expansion Pack-cpe:/a:redhat:jbosseapxp
Red HatRed Hat Single Sign-On 7-cpe:/a:redhat:red_hat_single_sign_on:7

II. Public POCs for CVE-2026-18572

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III. Intelligence Information for CVE-2026-18572

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Vendor Advisories for CVE-2026-18572 (2)

Same Patch Batch · Red Hat · 2026-08-02 · 4 CVEs total

CVE-2026-185716.6 MEDIUMKeycloak-services: keycloak-services: fgap v2 group assignment bypass during user creation
CVE-2026-185736.5 MEDIUMKeycloak-services: keycloak-services: client access-type policy condition bypass during cl
CVE-2026-185705.4 MEDIUMKeycloak-services: keycloak-services: full-scope-disabled client policy validation bypass

IV. Related Vulnerabilities

Same product: Red Hat Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-863

V. Comments for CVE-2026-18572

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