Client Registration Flaw in Keycloak's Vault Provider
CVE-2026-117688

5.3MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Build Of Keycloak
Red Hat Single Sign-on 7
Vendor
CVE Published:
29 October 2026

What is CVE-2026-117688?

A flaw exists in the client registration component of Keycloak, an open-source identity and access management solution. When utilizing a vault provider to securely store sensitive information, authenticated client owners can manipulate the system by leveraging specially crafted references. This manipulation allows them to expose secrets by directing a client secret to a vault entry and subsequently requesting the client configuration, revealing the sensitive data in plain text. Such a vulnerability may lead to unauthorized access to sensitive credentials that should remain confidential.

References

https://access.redhat.com/security/cve/CVE-2026-117688
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2561961
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Dongju Lee (@br0nzu) for reporting this issue.
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