high · 7.4

A flaw was found in Keycloak's OIDC component in the "checkLoginIframe," which allows unvalidated cross-origin messages.

CVE-2024-1249 · GHSA-m6q9-p373-g5q8 · EUVD-2024-1243 · published 17 Apr 2024

How serious is it

  • Severity: high, CVSS score 7.4 out of 10.
  • No exploit prediction (EPSS) score yet.
  • Not on the CISA list of exploited vulnerabilities.
  • No public exploit in Exploit-DB.

Is your app affected by CVE-2024-1249?

Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.

Who is affected

  • Red Hat Red Hat Single Sign-On 7.6 for RHEL 8: patch: 0:18.0.13-1.redhat_00001.1.el8sso
  • Red Hat RHOSS-1.33-RHEL-8: patch: 1.33.0-3
  • Red Hat Red Hat build of Keycloak 22: patch: 22-13
  • Red Hat RHEL-8 based Middleware Containers: patch: 7.6-46
  • Red Hat Red Hat build of Keycloak 22: patch: 22.0.10-1
  • Red Hat Red Hat Single Sign-On 7.6 for RHEL 9: patch: 0:18.0.13-1.redhat_00001.1.el9sso
  • Red Hat Red Hat build of Keycloak 22: patch: 22-16
  • Red Hat Red Hat Single Sign-On 7.6 for RHEL 7: patch: 0:18.0.13-1.redhat_00001.1.el7sso
  • Red Hat RHOSS-1.33-RHEL-8: patch: 1.33.0-5

How to check

  1. Find out whether you run the affected product and which version, then compare it with the versions above.

How to fix

Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
  1. Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
  2. If a vulnerable version was live, check your logs and rotate the secrets that server could read.

The advisory

A flaw was found in Keycloak's OIDC component in the "checkLoginIframe," which allows unvalidated cross-origin messages. This flaw allows attackers to coordinate and send millions of requests in seconds using simple code, significantly impacting the application's availability without proper origin validation for incoming messages.

Check your whole app

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References

Merged from ENISA EUVD. Last updated 27 Oct 2026. All vulnerabilities · RSS · JSON

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