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CVE-2026-9794

Keycloak: keycloak: information disclosure via saml ecp endpoint

Published: May 28, 2026Updated: May 28, 2026 Sources: CVE List NVD
NVD MITRE
5.3CVSS
MEDIUM

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:NA:N
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

Weaknesses

CWE-209

Affected Products

Red Hat Build of Keycloak
Red Hat

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Workaround Available

MITRE ATT&CK

1 technique
Discovery
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2026-9794
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2482461
bugzilla.redhat.com

Timeline

Published
May 28, 2026
Last Updated
May 28, 2026

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