CVE-2026-18572— Keycloak-services: keycloak-services: uma claim token can override authorization time-policy evaluation attributes
Quick assessment
Affected
Red Hat Red Hat build of Keycloak 26.6
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Keycloak是Keycloak组织开源的一种身份和访问管理解决方案。 Keycloak存在授权问题漏洞，该漏洞源于用户可在授权请求中包含伪造的时间值覆盖实际服务器时间，从而绕过基于时间的访问限制，在未授权时间访问受保护资源。
Affected Version Matrix 9
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6.7-3< * |
unaffected |
26.6-20< * |
unaffected | ||
26.6-20< * |
unaffected | ||
| Red Hat | Red Hat build of Keycloak 26.6.7 | any |
unaffected |
any |
unaffected | ||
any |
unaffected | ||
| Red Hat | Red Hat Data Grid 8 | any |
unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | any |
unaffected |
| Red Hat | Red Hat Single Sign-On 7 | any |
unaffected |
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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
Vulnerability Title
Keycloak 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak组织开源的一种身份和访问管理解决方案。 Keycloak存在授权问题漏洞，该漏洞源于用户可在授权请求中包含伪造的时间值覆盖实际服务器时间，从而绕过基于时间的访问限制，在未授权时间访问受保护资源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6.7-3 ~ * |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-20 ~ * |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-20 ~ * |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6.7 | - |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6.7 | - |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6.7 | - |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat Data Grid 8 | - |
cpe:/a:redhat:jboss_data_grid:8
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | - |
cpe:/a:redhat:jbosseapxp
|
|
| Red Hat | Red Hat Single Sign-On 7 | - |
cpe:/a:redhat:red_hat_single_sign_on:7
|
|
II. Public POCs for CVE-2026-18572
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-18572 (4)
-
-
-
-
🔗 RHSA-2026:68278 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
Same Patch Batch · Red Hat · 2026-08-02 · 4 CVEs total
| CVE-2026-18571 | 6.6 MEDIUM | Keycloak-services: keycloak-services: fgap v2 group assignment bypass during user creation |
| CVE-2026-18573 | 6.5 MEDIUM | Keycloak-services: keycloak-services: client access-type policy condition bypass during cl |
| CVE-2026-18570 | 5.4 MEDIUM | Keycloak-services: keycloak-services: full-scope-disabled client policy validation bypass |
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V. Comments for CVE-2026-18572
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