CVE-2026-15572

A flaw was found in Keycloak's Dynamic Client Registration (DCR) security policy management. The "Allowed Protocol Mapper Types" policy, which restricts which types of data mappers a client can use, fails to re-validate the mapper type during a client update if the mapper's configuration remains unchanged. An attacker with client registration privileges can exploit this by first registering an allowed mapper type with a malicious configuration and then swapping it for a restricted, high-privilege mapper type (such as one that hardcodes administrative roles). This allows the attacker to gain full administrative access to the Keycloak realm.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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-2026-15572	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2499592	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:redhat:build_of_keycloak::::::::
	cpe:2.3:a:redhat:build_of_keycloak::::::::

History

No history.

Information

Published : 2026-08-05 16:16

Updated : 2026-08-10 19:23

NVD link : CVE-2026-15572

Mitre link : CVE-2026-15572

CVE.ORG link : CVE-2026-15572

JSON object : View

Products Affected

redhat

build_of_keycloak

CWE

CWE-843

Access of Resource Using Incompatible Type ('Type Confusion')

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