CVE-2026-9800— Keycloak-policy-enforcer: keycloak policy enforcer: authorization bypass via incorrect uri comparison
Quick assessment
Affected
Red Hat Red Hat build of Keycloak 26.4
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组织开源的一种开源身份和访问管理解决方案。 Keycloak 26.6之前版本存在处理逻辑错误漏洞，该漏洞源于Policy Enforcer问题，允许任何认证用户通过在请求URL中包含配置的拒绝访问页面路径（作为路径段或查询参数），绕过所有授权策略，包括角色、范围及用户管理访问权限检查，从而未授权访问受保护资源。
Possible ATT&CK Techniques 1 AI
T1078 · Valid AccountsAffected Version Matrix 14
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4.13-1< * |
unaffected |
26.4-19< * |
unaffected | ||
26.4-19< * |
unaffected | ||
26.4.14-1< * |
unaffected | ||
26.4-22< * |
unaffected | ||
26.4-22< * |
unaffected | ||
| Red Hat | Red Hat build of Keycloak 26.4.13 | any |
unaffected |
| Red Hat | Red Hat build of Keycloak 26.4.14 | any |
unaffected |
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6.4-2< * |
unaffected |
26.6-8< * |
unaffected | ||
26.6-8< * |
unaffected | ||
| Red Hat | Red Hat build of Keycloak 26.6.4 | any |
unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | any |
unaffected |
| Red Hat | Red Hat Single Sign-On 7 | any |
unknown |
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I. Basic Information for CVE-2026-9800
Vulnerability Information
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Vulnerability Title
Keycloak-policy-enforcer: keycloak policy enforcer: authorization bypass via incorrect uri comparison
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak Policy Enforcer. This vulnerability allows any authenticated user to bypass all authorization policies, including role, scope, and User-Managed Access (UMA) permission checks. By including the configured access-denied page path within a request URL, either as a path segment or a query parameter, an attacker can gain unauthorized access to protected resources.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用错误要素进行比较
Source: CVE Program / CVE List V5
Vulnerability Title
Keycloak 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak组织开源的一种开源身份和访问管理解决方案。 Keycloak 26.6之前版本存在处理逻辑错误漏洞，该漏洞源于Policy Enforcer问题，允许任何认证用户通过在请求URL中包含配置的拒绝访问页面路径（作为路径段或查询参数），绕过所有授权策略，包括角色、范围及用户管理访问权限检查，从而未授权访问受保护资源。
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 26.4 | 26.4.13-1 ~ * |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-19 ~ * |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-19 ~ * |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4.14-1 ~ * |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-22 ~ * |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-22 ~ * |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.4.13 | - |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.4.14 | - |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6.4-2 ~ * |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-8 ~ * |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-8 ~ * |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6.4 | - |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| 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-2026-9800
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Vendor Advisories for CVE-2026-9800 (5)
-
-
🔗 RHSA-2026:50846 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:36013 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
-
🔗 RHSA-2026:50847 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
Other References for CVE-2026-9800 (5)
Same Patch Batch · Red Hat · 2026-06-25 · 13 CVEs total
| CVE-2026-12975 | 8.5 HIGH | Apicurio/apicurio-registry: apicurio-registry: unhardened saxparser in content-type detect |
| CVE-2026-11800 | 8.1 HIGH | Org.keycloak:keycloak-services: keycloak: authentication bypass via jwt algorithm confusio |
| CVE-2026-9099 | 7.7 HIGH | Keycloak: group-admin escalation to realm-admin |
| CVE-2026-12992 | 7.4 HIGH | Apicurio/apicurio-registry: apicurio-registry: ssrf via wsdl4j import dereference in wsdl |
| CVE-2026-9086 | 7.3 HIGH | Keycloak: keycloak: cross-site scripting (xss) via case-insensitive uri validation bypass |
| CVE-2026-13083 | 6.9 MEDIUM | Pen-drive: pen-drive: stored xss via unescaped cluster data in html report |
| CVE-2026-9705 | 6.5 MEDIUM | Keycloak: keycloak: attacker can re-enable and take over disabled clients via registration |
| CVE-2026-12993 | 6.5 MEDIUM | Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via |
| CVE-2026-13318 | 6.4 MEDIUM | Virt-api-rhel9: kubevirt: kubevirt: ssrf in virt-api port-forward via unvalidated guest-ag |
| CVE-2026-9083 | 4.9 MEDIUM | Keycloak: keycloak: information disclosure through arbitrary filesystem path probing |
| CVE-2026-9799 | 4.6 MEDIUM | Keycloak: keycloak: unauthorized access to resources via uma permission ticket bypass |
| CVE-2026-13218 | 4.2 MEDIUM | Kubevirt: kubevirt: symlink following in writetocachedfile allows host file overwrite from |
IV. Related Vulnerabilities
Same product: Red Hat build of Keycloak 26.4
-
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-
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Same weakness: CWE-1025
V. Comments for CVE-2026-9800
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