CVE-2026-9794

Keycloak: keycloak: information disclosure via saml ecp endpoint

Published: May 28, 2026Updated: Jun 26, 2026 Sources: CVE List NVDCWE-209

5.3MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:LConfidentiality

Low

I:NIntegrity

None

A:NAvailability

None

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Weaknesses

CWE-209

Affected Products

Red Hat

commercial·USaka redhat

Red Hat build of Keycloak 26.4On-premWeb App

Web & CMS Plugins

Red Hat build of Keycloak 26.4.13On-prem

DevTools & CI

Red Hat build of Keycloak 26.6On-prem

Security Products / identity-access-mgmt

Red Hat build of Keycloak 26.6.3On-prem

Security Products / identity-access-mgmt

build of keycloakOn-prem

Operating Systems / linux-distro

Exploitability

Official Patch Available

Workaround Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Discovery

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References

https://access.redhat.com/errata/RHSA-2026:25097

access.redhat.com

https://access.redhat.com/errata/RHSA-2026:25098

access.redhat.com

https://access.redhat.com/errata/RHSA-2026:30049

access.redhat.com

and 3 more references View all →

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