Identity and Access Management Flaw in Keycloak
CVE-2026-16102

8.1HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Build Of Keycloak
Red Hat Data Grid 8
Red Hat Jboss Enterprise Application Platform Expansion Pack
Red Hat Single Sign-on 7
Vendor
CVE Published:
5 August 2026

What is CVE-2026-16102?

A vulnerability exists in Keycloak's Dynamic Client Registration component that permits insufficient validation of claim paths related to User Property mappers. This flaw enables an attacker, possessing a standard user account along with an Initial Access Token, to manipulate access tokens to forge administrative roles. Consequently, this can empower the attacker to commandeer client entities, siphon sensitive information, and possibly achieve overarching administrative privileges within the realm.

References

https://access.redhat.com/security/cve/CVE-2026-16102
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2501735
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank yd1ng for reporting this issue.
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