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.
History

Wed, 03 Jun 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat build Of Keycloak
CPEs cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*
Vendors & Products Redhat build Of Keycloak

Thu, 28 May 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 28 May 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 28 May 2026 04:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Keycloak: keycloak: information disclosure via saml ecp endpoint
First Time appeared Redhat
Redhat build Keycloak
Weaknesses CWE-209
CPEs cpe:/a:redhat:build_keycloak:
Vendors & Products Redhat
Redhat build Keycloak
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-05-28T13:00:57.976Z

Reserved: 2026-05-28T03:15:11.408Z

Link: CVE-2026-9794

cve-icon Vulnrichment

Updated: 2026-05-28T13:00:53.570Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-28T05:16:40.847

Modified: 2026-06-03T19:37:44.490

Link: CVE-2026-9794

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-05-28T03:15:43Z

Links: CVE-2026-9794 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-28T06:15:10Z