Information Disclosure Vulnerability in Keycloak by Red Hat
CVE-2026-3911

2.7LOW

Key Information:

Vendor

Red Hat
Status
Red Hat Build Of Keycloak 26.4
Red Hat Build Of Keycloak 26.4.11
Vendor
CVE Published:
11 March 2026

What is CVE-2026-3911?

A flaw exists in Keycloak that allows authenticated users with the view-users role to exploit a weakness in the UserResource component. By accessing a specific administrative endpoint, these users can improperly retrieve hidden user attributes. This creates a risk of unauthorized access to sensitive user information, potentially exposing critical data. Organizations using Keycloak should evaluate their configurations and implement necessary security measures to mitigate this risk.

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Deploy the Patch

Affected Version(s)

Red Hat build of Keycloak 26.4 26.4.11-1

Red Hat build of Keycloak 26.4 26.4-14

Red Hat build of Keycloak 26.4 26.4-14

References

https://access.redhat.com/errata/RHSA-2026:6477
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:6478
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-3911
vdb-entryx_refsource_REDHAT

CVSS V3.1

Score:
2.7
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank drak3hft7 for reporting this issue.
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