CVE-2024-11734

mediumpriority · track · 0EPSS 0.009 · 61 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.95% (61st) EPSS

CVSS 6.5 · medium

Is it mine?

10 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · secalert@redhat.com USexploitability 2.8 · impact 3.6

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-693USCWE-693US

affected products (10)

Products and version ranges known to be affected.

Hitachi Ops Center <11.0.4-00all versionscert_bundDE
Open Source Keycloak <26.0.8all versionscert_bundDE
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat OpenShift Container Platformall versionscert_bundDEcpe:/a:redhat:openshift:container_platform
Hitachi Ops Center< 11.0.4-00cert_bundDE
Open Source Keycloak< 26.0.8cert_bundDE
Red Hat Red Hat build of Keycloak 26.0< 26.0-7enisa_euvdEU
Red Hat Red Hat build of Keycloak 26.0< 26.0-8enisa_euvdEU
Red Hat Red Hat build of Keycloak 26.0< 26.0.8-1enisa_euvdEU
Maven org.keycloak:keycloak-quarkus-server< 26.0.8osvUSpkg:maven/org.keycloak/keycloak-quarkus-server

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-0056Keycloak: Mehrere SchwachstellenDeutsch2025-01-13csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Keycloak ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen oder um vertrauliche Informationen offenzulegen.
GHSA-w3g8-r9gw-qrh8Denial of Service in Keycloak Server via Security Headers2025-01-13ghsa · osvUS
A potential Denial of Service (DoS) vulnerability has been identified in Keycloak, which could allow an administrative user with the rights to change realm settings to disrupt the service. This is done by modifying any of the security headers and inserting newlines, which causes the Keycloak server to write to a request that is already terminated, leading to a failure of said request. Service disruption may happen, users will be unable to access applications relying on Keycloak, or any of the consoles provided by Keycloak itself on the affected realm.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund osv NVD CVE.org MITRE

published 2025-01-14modified 2026-08-31

references (12)

External citations — patches, advisories, analysis.

scry

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