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CVE-2026-3047

Org.keycloak.broker.saml: keycloak saml broker: authentication bypass due to disabled saml client completing idp-initiated login

HIGH
8.8
CVSS Score
Published: March 5, 2026 at 06:28 PM UTC
Updated: July 15, 2026 at 02:20 AM UTC
2 products affected across 2 vendorsBuild of KeycloakKeycloak

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Severity
HIGH8.8
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Keycloak· Keycloak
95%
All versions
Build of Keycloak· Red Hatcontainer
95%
26.226.2.1426.426.4.10
Vendor states this is fixed in 26.2-16 (unaffected)
Vendor states this is fixed in 26.2.14 (unaffected)
Vendor states this is fixed in 26.2.14-1 (unaffected)
Vendor states this is fixed in 26.4-12 (unaffected)
Vendor states this is fixed in 26.4.10 (unaffected)
Vendor states this is fixed in 26.4.10-1 (unaffected)

References (7)

VDB Entryx_refsource_REDHATVendor Advisory
Source: cverecord
https://access.redhat.com/security/cve/CVE-2026-3047
Issue Trackingx_refsource_REDHATVendor Advisory
Source: cverecord
https://bugzilla.redhat.com/show_bug.cgi?id=2441966
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:3947
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:3948
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:3925
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:3926
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3047.json

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-305

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