CVE-2026-3047

HIGH

Keycloak SAML Broker - Authentication Bypass via Disabled IdP-Initiated Client

Title source: llm
STIX 2.1

Description

A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is configured as an Identity Provider (IdP)-initiated broker landing target, it can still complete the login process and establish a Single Sign-On (SSO) session. This allows a remote attacker to gain unauthorized access to other enabled clients without re-authentication, effectively bypassing security restrictions.

References (7)

Core 7
Core References
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2026:3925
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2026:3926
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2026:3947
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2026:3948
Vendor Advisory vdb-entry x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-3047
Vendor Advisory issue-tracking x_refsource_redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2441966

Scores

CVSS v3 8.8
EPSS 0.0047
EPSS Percentile 38.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-305
Status published
Products (13)
org.keycloak/keycloak-broker-saml 0Maven
Red Hat/Red Hat build of Keycloak 26.2 26.2-16
Red Hat/Red Hat build of Keycloak 26.2 26.2.14-1
Red Hat/Red Hat build of Keycloak 26.2.14
Red Hat/Red Hat build of Keycloak 26.4 26.4-12
Red Hat/Red Hat build of Keycloak 26.4 26.4.10-1
Red Hat/Red Hat build of Keycloak 26.4.10
redhat/build_of_keycloak
redhat/build_of_keycloak 26.2
redhat/build_of_keycloak 26.2.14
... and 3 more
Published Mar 05, 2026
Tracked Since Mar 06, 2026