CVE-2026-12388: medium-severity vulnerability in Red Hat Build of Keycloak
Keycloak-broker: keycloak: privilege escalation to realm administrator via improper authorization in identity provider mapper
Published
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.4%
A flaw was found in the Identity Provider (IdP) mapper component of Keycloak, which is used to manage how user information from external services is mapped to Keycloak users. An administrator with limited permissions to manage identity providers can exploit this flaw by creating a "Hardcoded Role" mapper that assigns high-level administrative roles (like realm-admin) to themselves or others. This allows a restricted administrator to bypass security checks and gain full control over the entire realm.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Affected products
Red Hat · Red Hat Build of KeycloakRelated CVEs — Red Hat Build of Keycloak
In the same product, most dangerous first.
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