CVE-2024-11734 - CVE House
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Status published Medium CVE-2024-11734

Org.keycloak:keycloak-quarkus-server: denial of service in keycloak server via security headers

Vulnerability Description

A denial of service vulnerability was found in Keycloak that could allow an administrative user with the right to change realm settings to disrupt the service. This action is done by modifying any of the security headers and inserting newlines, which causes the Keycloak server to write to a request that has already been terminated, leading to the failure of said request.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Red Hat would like to thank Chase Bowman (Contract Security) for reporting this issue.

Affected Vendor

Affected Software

Red Hat build of Keycloak 26.0, RHBK 26.0.8, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack
Vulnerable Versions:
0, 26.0.8-1, 26.0-7, 26.0-8

Timeline

Official Publish: January 14th, 2025
Last Modified: November 20th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)