CVE-2026-16102
Last modified
CVE-2026-16102 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 0.26% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Build Of Keycloak | >= 26.4, < 26.4.14 |
| Redhat | Build Of Keycloak | >= 26.6, < 26.6.5 |
| Redhat | Data Grid | 8.0 |
| Redhat | Jboss Enterprise Application Platform Expansion Pack | All versions |
| Redhat | Single Sign-On | 7.0 |
References
- https://access.redhat.com/errata/RHSA-2026:50846Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:50847Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:50848Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:50849Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-16102Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2501735Issue Tracking
Timeline
- Published
- Last Modified
- Status
- Analyzed
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