CVE intelligence and bounded remediation

CVE-2026-3047 — A flaw was found in org.keycloak.broker.saml

High CVSS 8.8

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.

Severity
High
CVSS
8.8 (3.1)
Published
2026-03-05
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-305

Affected products

  • redhat / build_of_keycloak
  • redhat / build_of_keycloak / 26.2
  • redhat / build_of_keycloak / 26.2.14
  • redhat / build_of_keycloak / 26.4
  • redhat / build_of_keycloak / 26.4.10
  • redhat / keycloak

Matched remediation archetype

Authentication bypass and missing authentication

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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