CVE-2024-11734

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

Published Jan 14, 2025 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-0048 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.
Github GHSA Github GHSA GHSA-w3g8-r9gw-qrh8 Denial of Service in Keycloak Server via Security Headers
History
Type Values Removed Values Added
CPEs cpe:/a:redhat:build_keycloak:
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Org.keycloak:keycloak-quarkus-server: denial of service in keycloak server via security headers
First Time appeared Redhat
Redhat build Keycloak
Redhat jboss Enterprise Application Platform
Redhat jbosseapxp
Weaknesses CWE-693
CPEs cpe:/a:redhat:build_keycloak:26.0
cpe:/a:redhat:build_keycloak:26.0::el9
cpe:/a:redhat:jboss_enterprise_application_platform:8
cpe:/a:redhat:jbosseapxp
Vendors & Products Redhat
Redhat build Keycloak
Redhat jboss Enterprise Application Platform
Redhat jbosseapxp
References
Metrics threat_severity

None

cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Aug 31, 2026, 12:27 AM
Reserved
Nov 26, 2024, 3:57 AM
Status
Deferred
Published
Jan 14, 2025, 9:15 AM
Modified
Aug 31, 2026, 1:16 AM
Severity
Moderate
Public date
Jan 13, 2025, 12:22 PM