CVE-2026-2603
Published: Mar 18, 2026
Modified: Mar 18, 2026
CVSS v3.1
8.1
Description
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.
| Vendor | Product | Versions |
|---|---|---|
Red Hat | Red Hat build of Keycloak 26.2 | unaffected 26.2.14-1 - < * |
Red Hat | Red Hat build of Keycloak 26.2 | unaffected 26.2-16 - < * |
Red Hat | Red Hat build of Keycloak 26.2 | unaffected 26.2-16 - < * |
Red Hat | Red Hat build of Keycloak 26.2.14 | All versions |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4.10-1 - < * |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4-12 - < * |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4-12 - < * |
Red Hat | Red Hat build of Keycloak 26.4.10 | All versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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