CVE-2026-3047
HIGH
GHSA-8cr3-vpxx-92cx
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2Description
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.
Analysis
Keycloak's SAML identity provider broker fails to enforce client disabled status during IdP-initiated SSO flows, allowing attackers with valid credentials to establish authenticated sessions and access other enabled clients without re-authentication. An authenticated remote attacker can exploit this authentication bypass to gain unauthorized access to protected resources across the Keycloak ecosystem. …
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Remediation
Within 24 hours: Audit all SAML identity provider configurations in Keycloak to identify disabled clients configured as IdP-initiated broker landing targets; disable or remove these configurations immediately. Within 7 days: Implement monitoring and logging for SAML authentication requests to detect exploitation attempts; conduct access reviews to identify suspicious SSO sessions established since vulnerability disclosure. …
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External POC / Exploit Code
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