{"id":"CVE-2026-16102","published":"2026-08-05T15:16:37.703","lastModified":"2026-08-06T15:37:22.093","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.","cvssScore":8.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","cwes":["CWE-284"],"vendors":[],"products":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:50846","tags":[]},{"url":"https://access.redhat.com/errata/RHSA-2026:50847","tags":[]},{"url":"https://access.redhat.com/errata/RHSA-2026:50848","tags":[]},{"url":"https://access.redhat.com/errata/RHSA-2026:50849","tags":[]},{"url":"https://access.redhat.com/security/cve/CVE-2026-16102","tags":[]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2501735","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"The flaw in Keycloak's Dynamic Client Registration component allows attackers to write values to sensitive claim locations, potentially forging administrative roles and gaining full control over the realm.","exploitability":"Exploitation requires a standard user account and an Initial Access Token but is considered high risk due to its potential for severe impact.","blast_radius":"If exploited, this flaw can lead to unauthorized access, data theft, and complete compromise of the Keycloak instance.","remediation":"Disable or restrict User Property mappers that write to sensitive claim locations or update to a patched version of Keycloak.","tags":["auth-bypass","misconfiguration","identity-management","keycloak"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-08-11T06:50:56.214Z"}}