Org.keycloak:keycloak-quarkus-server: denial of service in keycloak server via security headers
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| unaffected |
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| Red Hat | Red Hat build of Keycloak 26.0 | affected |
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| Red Hat | Red Hat build of Keycloak 26.0 | affected |
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| Red Hat | Red Hat build of Keycloak 26.0 | affected |
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| Red Hat | RHBK 26.0.8 | unaffected | — | ||||||
| Red Hat | Red Hat Build of Keycloak | affected | — | ||||||
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 | unaffected | — | ||||||
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | unaffected | — |
No data.
| Package | CPE | Advisory | Released Date |
|---|---|---|---|
| Red Hat build of Keycloak 26.0 | |||
| rhbk/keycloak-operator-bundle:26.0.8-1 | cpe:/a:redhat:build_keycloak:26.0::el9 | RHSA-2025:0299 | 2025-01-13T00:00:00Z |
| rhbk/keycloak-rhel9:26.0-7 | cpe:/a:redhat:build_keycloak:26.0::el9 | RHSA-2025:0299 | 2025-01-13T00:00:00Z |
| rhbk/keycloak-rhel9-operator:26.0-8 | cpe:/a:redhat:build_keycloak:26.0::el9 | RHSA-2025:0299 | 2025-01-13T00:00:00Z |
| RHBK 26.0.8 | |||
| org.keycloak/keycloak-quarkus-server | cpe:/a:redhat:build_keycloak:26.0 | RHSA-2025:0300 | 2025-01-13T00:00:00Z |
No data available yet.
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.
| Source | ID | Title |
|---|---|---|
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 |
GHSA-w3g8-r9gw-qrh8 | Denial of Service in Keycloak Server via Security Headers |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.945% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:/a:redhat:build_keycloak: |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| 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 |
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| Vendors & Products |
Redhat
Redhat build Keycloak Redhat jboss Enterprise Application Platform Redhat jbosseapxp |
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| References |
| |
| Metrics |
threat_severity
|
cvssV3_1
|