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CVE-2026-16443

7.4 · HIGH

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.

Published Aug 5, 2026CWE-347EPSS 0.26%

Overview

CVE-2026-16443 is a high-severity vulnerability. It was published on August 5, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/errata/RHSA-2026:50846Refaccess.redhat.com/errata/RHSA-2026:50847Refaccess.redhat.com/errata/RHSA-2026:50848Refaccess.redhat.com/errata/RHSA-2026:50849Refaccess.redhat.com/security/cve/CVE-2026-16443Refbugzilla.redhat.com/show_bug.cgi?id=2503139

How CyberStrike helps

Frequently asked questions

What is CVE-2026-16443?

CVE-2026-16443 is a high-severity vulnerability. It was published on August 5, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-16443?

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-16443?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-16443?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-16443 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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