Org.keycloak.broker.saml: keycloak saml broker: authentication bypass due to disabled saml client completing idp-initiated login
Summary
| CVE | CVE-2026-3047 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-03-05 19:16:18 UTC |
| Updated | 2026-06-30 03:19:10 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 8.8 HIGH from ADP
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.004690000 probability, percentile 0.372260000 (date 2026-07-02)
Problem Types: CWE-305 | CWE-305 Authentication Bypass by Primary Weakness
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | CVSS | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | [email protected] | Secondary | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | Secondary | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 8.8 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Redhat | Build Of Keycloak | - | All | All | All |
| Application | Redhat | Build Of Keycloak | 26.2 | All | All | All |
| Application | Redhat | Build Of Keycloak | 26.2.14 | All | All | All |
| Application | Redhat | Build Of Keycloak | 26.4 | All | All | All |
| Application | Redhat | Build Of Keycloak | 26.4.10 | All | All | All |
| Application | Redhat | Keycloak | - | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Red Hat | Red Hat Build Of Keycloak 26.2 | unaffected 26.2.14-1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.2 | unaffected 26.2-16 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.2 | unaffected 26.2-16 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.2.14 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4 | unaffected 26.4.10-1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4 | unaffected 26.4-12 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4 | unaffected 26.4-12 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4.10 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak 26.2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak 26.4 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak 26.2.14 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak 26.4.10 | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/errata/RHSA-2026:3925 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | Vendor Advisory |
| access.redhat.com/errata/RHSA-2026:3947 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | Vendor Advisory |
| access.redhat.com/errata/RHSA-2026:3948 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | Vendor Advisory |
| access.redhat.com/errata/RHSA-2026:3926 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | Vendor Advisory |
| bugzilla.redhat.com/show_bug.cgi | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | bugzilla.redhat.com | Issue Tracking, Vendor Advisory |
| access.redhat.com/security/cve/CVE-2026-3047 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | Vendor Advisory |
| security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3047.json | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | security.access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-02-23T17:29:50.192Z | Reported to Red Hat. |
| CNA | 2026-03-05T11:24:00.000Z | Made public. |
| ADP | 2026-02-23T17:29:50.192Z | Reported to Red Hat. |
| ADP | 2026-03-05T11:24:00.000Z | Made public. |
Solutions
ADP: RHSA-2026:3925: Red Hat build of Keycloak 26.2
ADP: RHSA-2026:3948: Red Hat build of Keycloak 26.4
ADP: RHSA-2026:3926: Red Hat build of Keycloak 26.2.14
ADP: RHSA-2026:3947: Red Hat build of Keycloak 26.4.10
Workarounds
CNA: To mitigate this issue, ensure that any SAML client intended to be disabled is not configured as an IdP-initiated broker landing target within Keycloak. Review your Keycloak realm configurations to identify and remove any such associations for disabled clients.
ADP: To mitigate this issue, ensure that any SAML client intended to be disabled is not configured as an IdP-initiated broker landing target within Keycloak. Review your Keycloak realm configurations to identify and remove any such associations for disabled clients.