CVE-2026-9794CWE-209

Keycloak: keycloak: information disclosure via saml ecp endpoint

Medium · published May 28, 2026

CVSS v3.1
5.3
EPSS
1%
Percentile
46.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00575 · 46.7th percentile
Weakness
CWE-209 · Generation of Error Message Containing Sensitive Information
Published
2026-05-28T03:44Z
EPSS history
Timeline
  • 28 MAY 03:44Z
    Keycloak: keycloak: information disclosure via saml ecp endpoint
    cvelistv5