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CVE-2026-16102

8.1 · HIGH

A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution.

Published Aug 5, 2026CWE-284EPSS 0.46%

Overview

CVE-2026-16102 is a high-severity vulnerability. It was published on August 5, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution. The default DCR policy fails to properly validate the claim path for User Property mappers, allowing them to write values to sensitive internal claim locations. An attacker with a standard user account and a limited Initial Access Token can exploit this to forge administrative roles in their access token. This allows the attacker to take over other clients, steal confidential secrets, and potentially gain full administrative control over the realm.

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-2026-16102Refbugzilla.redhat.com/show_bug.cgi?id=2501735

How CyberStrike helps

Frequently asked questions

What is CVE-2026-16102?

CVE-2026-16102 is a high-severity vulnerability. It was published on August 5, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-16102?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-16102?

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-2026-16102?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-16102 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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