CVE-2026-16102— Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers
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 Keycloak是Keycloak组织开源的一款身份认证与权限管理软件。 Keycloak存在安全漏洞，该漏洞源于Dynamic Client Registration (DCR)组件中的默认DCR策略未能正确验证用户属性映射器的声明路径，导致具有标准用户帐户和有限初始访问令牌的攻击者能够伪造管理角色，从而接管其他客户端、窃取机密秘密，并可能获得领域的完全管理控制。
Affected Version Matrix 14
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4.14-1< * |
unaffected |
26.4-22< * |
unaffected | ||
26.4-22< * |
unaffected | ||
| Red Hat | Red Hat build of Keycloak 26.4.14 | any |
unaffected |
any |
unaffected | ||
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6.5-1< * |
unaffected |
26.6-11< * |
unaffected | ||
26.6-11< * |
unaffected | ||
| Red Hat | Red Hat build of Keycloak 26.6.5 | 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 |
affected |
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I. Basic Information for CVE-2026-16102
Vulnerability Information
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Vulnerability Title
Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution. The default DCR policy fails to properly validate the claim path for User Property mappers, allowing them to write values to sensitive internal claim locations. An attacker with a standard user account and a limited Initial Access Token can exploit this to forge administrative roles in their access token. This allows the attacker to take over other clients, steal confidential secrets, and potentially gain full administrative control over the realm.
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
不正确的行为次序：在解析与净化处理之前进行授权
Source: CVE Program / CVE List V5
Vulnerability Title
Keycloak 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak Keycloak是Keycloak组织开源的一款身份认证与权限管理软件。 Keycloak存在安全漏洞，该漏洞源于Dynamic Client Registration (DCR)组件中的默认DCR策略未能正确验证用户属性映射器的声明路径，导致具有标准用户帐户和有限初始访问令牌的攻击者能够伪造管理角色，从而接管其他客户端、窃取机密秘密，并可能获得领域的完全管理控制。
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 | 26.4.14-1 ~ * |
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 26.4.14 | - |
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 | 26.6.5-1 ~ * |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-11 ~ * |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-11 ~ * |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6.5 | - |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6.5 | - |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6.5 | - |
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-2026-16102
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-16102 (6)
-
-
-
🔗 RHSA-2026:50846 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
-
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🔗 RHSA-2026:50847 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
Same Patch Batch · Red Hat · 2026-08-05 · 11 CVEs total
| CVE-2026-10059 | 9.1 CRITICAL | Cluster-curator-controller: cluster-curator-controller: namespace admin can escalate to cl |
| CVE-2026-10090 | 9.0 CRITICAL | Multicluster-operators-subscription: multicluster-operators-subscription: namespace edit u |
| CVE-2026-15572 | 8.8 HIGH | Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows p |
| CVE-2026-15573 | 8.1 HIGH | Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching i |
| CVE-2026-16443 | 7.4 HIGH | Keycloak-services: keycloak-services: saml broker metadata import disables response signat |
| CVE-2026-16442 | 7.4 HIGH | Keycloak-services: keycloak-services: saml idp-initiated broker login bypasses link-only r |
| CVE-2026-16100 | 6.5 MEDIUM | Keycloak-services: keycloak-services: unbounded metric cardinality in user event metrics v |
| CVE-2026-49331 | 6.5 MEDIUM | Openshift/oauth-proxy: openshift/oauth-proxy: unauthenticated identity header injection on |
| CVE-2026-44605 | 5.5 MEDIUM | Rpm: heap buffer overflow in ndb slot table parsing |
| CVE-2026-16071 | 5.4 MEDIUM | Keycloak-services: keycloak-services: ldap entry-dn user search bypasses configured users |
IV. Related Vulnerabilities
Same product: Red Hat build of Keycloak 26.4
-
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Same vendor: Red Hat
-
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Same weakness: CWE-551
-
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Peplink InControl 2 授权问题漏洞 -
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V. Comments for CVE-2026-16102
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