8.1High
CVE-2026-16102Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers
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.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| build keycloak | 26.4 | — | |
| build keycloak | 26.6 | — | |
| redhat | build of keycloak | 26.4 – < 26.4.14 | |
| redhat | data grid | 8.0 | |
| redhat | jboss enterprise application platform expansion pack | — | |
| Red Hat | Red Hat build of Keycloak 26.4 | all versions | |
| Red Hat | Red Hat build of Keycloak 26.4.14 | — | |
| Red Hat | Red Hat build of Keycloak 26.6 | all versions | |
| Red Hat | Red Hat build of Keycloak 26.6.5 | — | |
| Red Hat | Red Hat Data Grid 8 | — | |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | — | |
| Red Hat | Red Hat Single Sign-On 7 | all versions | |
| redhat | single sign-on | 7.0 |
References and patches
- RHSA-2026:50846 vendor-advisoryVendor Advisory
- RHSA-2026:50847 vendor-advisoryVendor Advisory
- RHSA-2026:50848 vendor-advisoryVendor Advisory
- RHSA-2026:50849 vendor-advisoryVendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-16102 vdb-entryVendor Advisory
- RHBZ#2501735 issue-trackingIssue Tracking
CPE matches (NVD) (5)
cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*≥ 26.4 < 26.4.14cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*≥ 26.6 < 26.6.5cpe:2.3:a:redhat:data_grid:8.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:jboss_enterprise_application_platform_expansion_pack:-:*:*:*:*:*:*:*cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*