GHSA-m6q9-p373-g5q8 is a high-severity (CVSS 7.4) CWE-346 vulnerability in org.keycloak:keycloak-services. A fix is available for org.keycloak:keycloak-services — see the affected versions and patch details below.
Keycloak's unvalidated cross-origin messages in checkLoginIframe leads to DDoS
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-m6q9-p373-g5q8.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-m6q9-p373-g5q8 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,333 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
org.keycloak:keycloak-services☕org.keycloak:keycloak-servicesReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
A potential security flaw in the "checkLoginIframe" which allows unvalidated cross-origin messages, enabling potential DDoS attacks. By exploiting this vulnerability, attackers could coordinate to send millions of requests in seconds using simple code, significantly impacting the application's availability without proper origin validation for incoming messages.
Acknowledgements
Special thanks to Adriano Márcio Monteiro from BRZTEC for reporting this issue and helping us improve our project.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.keycloak:keycloak-services | all versions | 22.0.10org.keycloak:keycloak-services:22.0.10 |
| ☕Maven | org.keycloak:keycloak-services | ≥ 23.0.0&&< 24.0.3 | 24.0.3org.keycloak:keycloak-services:24.0.3 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.keycloak:keycloak-services, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.keycloak:keycloak-services to 22.0.10 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-m6q9-p373-g5q8 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-m6q9-p373-g5q8 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-m6q9-p373-g5q8. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
The vulnerability in Keycloak's OIDC component allowing unvalidated cross-origin messages in the "checkLoginIframe" function represents an important severity issue due to its potential to cause significant disruption and resource exhaustion. Exploitation of this flaw can lead to a Denial of Service (DoS) condition,…
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat AMQ Broker 7 | keycloak | RHSA-2024:2945 |
| Red Hat build of Keycloak 22 | rhbk/keycloak-operator-bundle:22.0.10-1 | RHSA-2024:1867 |
| Red Hat build of Keycloak 22.0.10 | keycloak | RHSA-2024:1868 |
| Red Hat Single Sign-On 7.6 for RHEL 7 | rh-sso7-keycloak-0:18.0.13-1.redhat_00001.1.el7sso | RHSA-2024:1860 |
| Red Hat Single Sign-On 7.6 for RHEL 8 | rh-sso7-keycloak-0:18.0.13-1.redhat_00001.1.el8sso | RHSA-2024:1861 |
| Red Hat Single Sign-On 7.6 for RHEL 9 | rh-sso7-keycloak-0:18.0.13-1.redhat_00001.1.el9sso | RHSA-2024:1862 |
| RHEL-8 based Middleware Containers | rh-sso-7/sso76-openshift-rhel8:7.6-46 | RHSA-2024:1864 |
| RHOSS-1.33-RHEL-8 | openshift-serverless-1/logic-data-index-ephemeral-rhel8:1.33.0-5 | RHSA-2024:4057 |
Frequently Asked Questions
Is GHSA-m6q9-p373-g5q8 in your dependencies?
O3 Security finds GHSA-m6q9-p373-g5q8 across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.