Widely used Keycloak IAM; authentication bypass enables cross-client SSO without re-auth, risking broad access across orgs.
CVE-2026-3047
Keycloak SAML IdP-initiated login bypass enables unauthorized SSO across clients.
Is CVE-2026-3047 being exploited?
Not confirmed. CVE-2026-3047 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.47% probability of exploitation in the next 30 days.
How severe is CVE-2026-3047?
CVE-2026-3047 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-3047?
Yes. A fix has been recorded for CVE-2026-3047. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-3047 affect?
CVE-2026-3047 affects Keycloak. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-3047?
Apply the latest Keycloak patch; review SAML IdP-initiated configurations.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker can access other enabled Keycloak clients without re-auth, bypassing access controls.
Patch when possible