CVE-2026-16443

A flaw was found in the SAML metadata import functionality of the keycloak-services component, which is the core engine for identity brokering in Red Hat Build of Keycloak. When importing identity provider metadata that lacks specific usage attributes for keys, the system incorrectly disables signature validation for SAML responses even if a signing certificate is provided. This issue allows an unauthenticated attacker to forge a SAML response and gain unauthorized access to a user account by knowing their external identifier.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:50846	Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:50847	Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:50848	Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:50849	Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-16443	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2503139	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:redhat:build_of_keycloak::::::::
	cpe:2.3:a:redhat:build_of_keycloak::::::::

History

No history.

Information

Published : 2026-08-05 14:17

Updated : 2026-08-10 18:52

NVD link : CVE-2026-16443

Mitre link : CVE-2026-16443

CVE.ORG link : CVE-2026-16443

JSON object : View

Products Affected

redhat

build_of_keycloak

CWE

CWE-347

Improper Verification of Cryptographic Signature

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