CVE-2026-9794
Keycloak: keycloak: information disclosure via saml ecp endpoint
- Published
- May 28, 2026
- Updated
- Jun 26, 2026
- Assigning CNA
- redhat
- Evidence observed
- Sep 14, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NLow · next 30 days
- Percentile
- 26.5%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
A flaw was found in Keycloak. A remote, unauthenticated attacker can exploit this vulnerability by sending specially crafted SOAP requests to the SAML ECP (Security Assertion Markup Language Enhanced Client or Proxy) endpoint with varying client IDs. By observing distinct faultstrings in the responses, the attacker can determine the client's protocol type, leading to information disclosure.
Sources
1- keycloakResearch
Security research disclosing CVE-2026-9794, an unauthenticated client ID enumeration flaw in Keycloak SAML ECP via faultstring oracle, fixed in 26.6.3.
Responsible use
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