CVE-2026-9792

MEDIUM

Keycloak: keycloak: security restriction bypass allows unauthorized ropc token acquisition

Title source: cna
STIX 2.1

Description

A flaw was found in Keycloak's Client Policies, specifically within the `org.keycloak.protocol.oidc` component. When certain condition providers (client-type, client-roles, client-attributes, client-scopes) are used to enforce security restrictions, the `reject-ropc-grant` executor is silently bypassed. This allows an unauthenticated remote attacker to obtain tokens via a Resource Owner Password Credentials (ROPC) grant, even when a policy is explicitly configured to block it. This bypass can lead to unauthorized access and information disclosure.

References (6)

Core 6
Core References
Vendor Advisory vendor-advisory x_refsource_redhat
RHSA-2026:25097
https://access.redhat.com/errata/RHSA-2026:25097
Vendor Advisory vendor-advisory x_refsource_redhat
RHSA-2026:25098
https://access.redhat.com/errata/RHSA-2026:25098
Vendor Advisory vendor-advisory x_refsource_redhat
RHSA-2026:30049
https://access.redhat.com/errata/RHSA-2026:30049
Vendor Advisory vendor-advisory x_refsource_redhat
RHSA-2026:30050
https://access.redhat.com/errata/RHSA-2026:30050
Vdb Entry, X_Refsource_Redhat vdb-entry x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-9792
Issue Tracking, X_Refsource_Redhat issue-tracking x_refsource_redhat
RHBZ#2482459
https://bugzilla.redhat.com/show_bug.cgi?id=2482459

Scores

CVSS v3 6.5
EPSS 0.0027
EPSS Percentile 18.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-280
Status published
Products (13)
org.keycloak/keycloak-services 0 - 26.4.7Maven
org.keycloak/keycloak-services 26.5.0 - 26.6.3Maven
Red Hat/Red Hat Build of Keycloak
Red Hat/Red Hat build of Keycloak 26.4 26.4-19
Red Hat/Red Hat build of Keycloak 26.4 26.4.13-1
Red Hat/Red Hat build of Keycloak 26.4.13
Red Hat/Red Hat build of Keycloak 26.6 26.6-6
Red Hat/Red Hat build of Keycloak 26.6 26.6-8
Red Hat/Red Hat build of Keycloak 26.6 26.6.3-3
Red Hat/Red Hat build of Keycloak 26.6 26.6.4-2
... and 3 more
Published May 28, 2026
Tracked Since May 28, 2026