HIGH
CVE-2026-16102
CVSS
8.1
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.
Weakness (CWE)
CWE-551
CWE-284
Improper Access Control
EPSS Score
0.32%
Probability of exploitation in next 30 days
25.7th percentile
References
https://access.redhat.com/errata/RHSA-2026:50846
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:50847
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:50848
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:50849
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-16102
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2501735
Issue Tracking
Base CVE data derived from NVD (public domain). Enrichment by
dbcve.org
(CC-BY-4.0). Fetched via API.