Authorization Code Exposure in Red Hat Build of Keycloak
CVE-2026-16089

5.4MEDIUM

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:
17 July 2026

What is CVE-2026-16089?

A vulnerability has been identified in the keycloak-services component of Red Hat's Build of Keycloak, where OAuth 2.0 authorization codes are inadequately linked to the originating client. This flaw allows an attacker, who successfully intercepts an authorization code, to alter it and redeem it using their own client. This manipulation could lead to unauthorized access tokens being issued, resulting in potential identity compromise of the affected user.

References

https://access.redhat.com/security/cve/CVE-2026-16089
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2501724
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Paul Bottinelli (Trail of Bits) for reporting this issue.
.