---
id: CVE-2024-11734
title: >-
  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
summary: >-
  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 ne…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-693
published: '2025-01-14'
updated: '2026-08-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-11734'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2025:0299'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:0300'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2024-11734'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2328846'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00951
epssPercentile: 0.59735
ingestedAt: '2026-08-04T07:38:00.257Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.