Advisory severityMedium6.5Red Hat Linux

Medium [CVE-2024-11734] Org.keycloak:keycloak-quarkus-server: denial of service in keycloak server via security headers

This medium-severity Red Hat Linux advisory covers CVE-2024-11734 affecting Red Hat build of Keycloak 26.0, RHBK 26.0.8.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2024-11734 Source published Jan 14, 2025Source updated Jan 13, 2025

VulniPulse record published Aug 4, 2026

CVE-2024-11734

Affected products & platforms

Red Hat LinuxUnclassified

Open source advisory

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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 newlines, which causes the Keycloak server to write to a request that has already been terminated, leading to the failure of said request. Red Hat has evaluated this vulnerability and its impact is restricted to Keycloak.

No Keycloak connectors/adapters are affected. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Weakness: CWE-693. Affected Red Hat products: Red Hat build of Keycloak 26.0; RHBK 26.0.8; Red Hat Build of Keycloak.

Red Hat lists Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack as not affected. Will not fix / out of support: Red Hat Build of Keycloak.

Red Hat fixing advisory: RHSA-2025:0299, RHSA-2025:0300.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 17 days ago·verify at source

Fixed versions

rhbk/keycloak-operator-bundle:26.0.8-1
rhbk/keycloak-rhel9:26.0-7
rhbk/keycloak-rhel9-operator:26.0-8
RHSA-2025:0299
RHSA-2025:0300

Official advisory · high-confidence parse· fetched 17 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

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.

Official advisory · high-confidence parse· fetched 17 days ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Red Hat Security Data APIofficial
Official vendor source used to discover this advisory; it remains the authority for affected products and remediation. Discovered from the machine-readable feed https://access.redhat.com/hydra/rest/securitydata/cve.json; this link opens the Red Hat Linux advisory index instead of the raw feed document.
Red Hat Linux
Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Red Hat Linux
CVE.org CNA affected-product recordCVE.org
Structured CNA affected[] data independently confirmed the affected product scope; native advisory content remains authoritative.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2024-11734NVD CVE.org MITRE

Discussion(0)

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