CVEvulnerability

CVE-2026-16102

8.1 HIGH Published 2026-08-05 Modified 2026-08-31 Official page ↗
Status
Modified
Published
2026-08-05
Last modified
2026-08-31
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-284, CWE-551

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.

Affected configurations

• 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 • redhat single sign-on 7.0

Related

Weakness · CWE (2)

  • CWE-284 Improper Access Control weakness
  • CWE-551 Incorrect Behavior Order: Authorization Before Parsing and Canonicalization weakness

References