TI-2024-10880 Aliases CVE-2024-11734 GHSA-w3g8-r9gw-qrh8

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

LOW 31CWE-693Published 2025-01-14 · Updated 2026-08-31

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · None · High
Fix status: Partial Red Hat: 2 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-693.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00945 61st percentileScored 2026-11-07

Fix Partial keycloak: 26.0.8org.keycloak:keycloak-quarkus-server (Maven): 26.0.8Red Hat: 2 advisoriesRed Hat: 2 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	keycloak	before 26.0.8	26.0.8	Patch available	CNA
Red Hat	Red Hat build of Keycloak 26.0	—	26.0.8-1	Patch available	CNA
Red Hat	Red Hat build of Keycloak 26.0	—	26.0-7	Patch available	CNA
Red Hat	Red Hat build of Keycloak 26.0	—	26.0-8	Patch available	CNA
Red Hat	RHBK 26.0.8	—	—	Not affected	CNA
Red Hat	Red Hat Build of Keycloak	—	—	No fix listed	CNA
Red Hat	Red Hat JBoss Enterprise Application Platform 8	—	—	Not affected	CNA
Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	—	—	Not affected	CNA
—	org.keycloak:keycloak-quarkus-server (Maven)	before 26.0.8	26.0.8	Patch available	GHSA-w3g8-r9gw-qrh8

keycloak Vendor— Affected before 26.0.8 Fixed in 26.0.8 Patch available CNA
Red Hat build of Keycloak 26.0 VendorRed Hat Affected — Fixed in 26.0.8-1 Patch available CNA
Red Hat build of Keycloak 26.0 VendorRed Hat Affected — Fixed in 26.0-7 Patch available CNA
Red Hat build of Keycloak 26.0 VendorRed Hat Affected — Fixed in 26.0-8 Patch available CNA
RHBK 26.0.8 VendorRed Hat Affected — Fixed in — Not affected CNA
Red Hat Build of Keycloak VendorRed Hat Affected — Fixed in — No fix listed CNA
Red Hat JBoss Enterprise Application Platform 8 VendorRed Hat Affected — Fixed in — Not affected CNA
Red Hat JBoss Enterprise Application Platform Expansion Pack VendorRed Hat Affected — Fixed in — Not affected CNA
org.keycloak:keycloak-quarkus-server (Maven) Vendor— Affected before 26.0.8 Fixed in 26.0.8 Patch available GHSA-w3g8-r9gw-qrh8

CPE names CNA · 5

CPE	Versions	Role	Vendor
cpe:/a:redhat:build_keycloak:26.0::el9	26.0	—	Red Hat
cpe:/a:redhat:build_keycloak:26.0	26.0	—	Red Hat
cpe:/a:redhat:build_keycloak:	—	—	Red Hat
cpe:/a:redhat:jboss_enterprise_application_platform:8	8	—	Red Hat
cpe:/a:redhat:jbosseapxp	—	—	Red Hat

cpe:/a:redhat:build_keycloak:26.0::el9 Versions 26.0 — ·Red Hat
cpe:/a:redhat:build_keycloak:26.0 Versions 26.0 — ·Red Hat
cpe:/a:redhat:build_keycloak: Versions — — ·Red Hat
cpe:/a:redhat:jboss_enterprise_application_platform:8 Versions 8 — ·Red Hat
cpe:/a:redhat:jbosseapxp Versions — — ·Red Hat

Remediation

Fix · CNA keycloak Fixed in 26.0.8
Fix · GHSA-w3g8-r9gw-qrh8 org.keycloak:keycloak-quarkus-server (Maven) Fixed in 26.0.8 Advisory →

Red Hat 2 advisories

RHSA-2025:0299 Released 2025-01-13 · Red Hat rating Moderate
Red Hat build of Keycloak 26.0.8 Images Update
- Red Hat build of Keycloak 26.0 rhbk/keycloak-operator-bundle, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9-operator
RHSA-2025:0300 Released 2025-01-13 · Red Hat rating Moderate
Red Hat build of Keycloak 26.0.8 Update
- RHBK 26.0.8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2025-01-14
Red Hat RHBK 26.0.8, Red Hat Build of Keycloak and 3 more products — RHSA-2025:0299
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2024-10881 Org.keycloak:keycloak-quarkus-server: unrestricted admin use of system and environment variablesPriority LOW 24
Show all 2 records → Advisory →
Advisory · 2025-01-14
Red Hat RHBK 26.0.8, Red Hat Build of Keycloak and 3 more products — RHSA-2025:0300
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2024-10881 Org.keycloak:keycloak-quarkus-server: unrestricted admin use of system and environment variablesPriority LOW 24
Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Build of Keycloak	Affected	No fix planned: Will not fix
RHBK 26.0.8	Fixed	RHSA-2025:0300
Red Hat build of Keycloak 26.0	Fixed	RHSA-2025:0299

Not affected: 2 products

Red Hat JBoss Enterprise Application Platform 8
Red Hat JBoss Enterprise Application Platform Expansion Pack

Timeline

2026-10-02 Threatist record created from CVE-2024-11734
2026-10-03 Alias added: GHSA-w3g8-r9gw-qrh8

References

Advisory 3

Other 5

TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8

See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences