CVE-2026-16443

high Red Hat
CVSS v3 Base Score
7.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
None
Published: August 5, 2026 (32 days ago)
Last Modified: August 5, 2026
Vendor: Red Hat
Fix Available: ✓ Yes
Source: REDHAT

Description

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.

CWE

CWE-347

Affected Products

Red Hat Data Grid 8Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat Single Sign-On 7Red Hat build of Keycloak 26.4Red Hat build of Keycloak 26.4.14Red Hat build of Keycloak 26.6Red Hat build of Keycloak 26.6.5

Fix Status

✅ Fix Available

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov