What’s Vulnerable › Vulnerabilities

CVE-2026-3047: Org.keycloak.broker.saml: keycloak saml broker: authentication bypass due to disabled saml client completing idp-initiated login

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-05 · updated 2026-07-15
• Weakness: CWE-305

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 products

• Red Hat build of Keycloak 26.4: 26.2, 26.2.14, 26.4, 26.4.10
• Keycloak: all versions

References

• https://access.redhat.com/errata/RHSA-2026:3925
• https://access.redhat.com/errata/RHSA-2026:3926
• https://access.redhat.com/errata/RHSA-2026:3947
• https://access.redhat.com/errata/RHSA-2026:3948
• https://access.redhat.com/security/cve/CVE-2026-3047
• https://bugzilla.redhat.com/show_bug.cgi?id=2441966
• https://access.redhat.com/errata/RHSA-2026:3925
• https://access.redhat.com/errata/RHSA-2026:3926
• https://access.redhat.com/errata/RHSA-2026:3947
• https://access.redhat.com/errata/RHSA-2026:3948
• https://access.redhat.com/security/cve/CVE-2026-3047
• https://bugzilla.redhat.com/show_bug.cgi?id=2441966

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