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    CVE-2026-2603

    A flaw was found in Keycloak. A remote attacker could bypass security controls by sending a valid SAML response from an external Identity Provider (IdP) to the Keycloak SAML endpoint for IdP-initiated broker logins. This allows the attacker to complete broker logins even when the SAML Identity Provider is disabled, leading to unauthorized authentication.

    Published:Mar 5, 2026
    Last Modified:Aug 18, 2026
    EPS:Mar 18, 2026
    EPSS Score:0.00413
    CVSS Score:8.1

    Affected Products

    Vendor
    Keycloak
    Product
    Keycloak
    Vendor
    Redhat
    Product
    Build Keycloak
    Vendor
    Redhat
    Product
    Build Of Keycloak

    Exploits

    https://bugzilla.redhat.com/show_bug.cgi?id=2440300https://bugzilla.redhat.com/show_bug.cgi?id=2440300https://bugzilla.redhat.com/show_bug.cgi?id=2440300

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High