CVE-2026-4629 | A flaw was found in Keycloak. A highly privileged user with … | CVSS 6.5 MEDIUM

Description

A flaw was found in Keycloak. A highly privileged user with `manage-clients` permission can exploit this vulnerability by injecting a hardcoded role mapper into any client. This action allows the user to bypass existing scope restrictions and inject the `realm-admin` role into generated tokens, resulting in privilege escalation and full administrative access to the realm.

Metadata

CVE ID: CVE-2026-4629
State: PUBLISHED
Assigner: redhat
Reserved: 2026-03-23 08:02 UTC
Published: 2026-06-30 12:00 UTC
Last updated: 2026-06-30 12:00 UTC
Primary CWE: CWE-266
Incorrect Privilege Assignment
Vendor / Product: Red Hat / Red Hat Build of Keycloak
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Affected products (1)

Vendor	Product	Platform	Versions
Red Hat	Red Hat Build of Keycloak	—	—

Weakness (CWE)

CWE	Source	Description
CWE-266	cna	Incorrect Privilege Assignment

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.5	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

References (2)