CVE•Published 2026-05-28•Modified 2026-06-03•0 articles on news•5 live references•NVD data

CVE-2026-9794Redhat · Build_of_keycloak

Vulnerability data via NVD (ingested)

CVSS v3.1

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS percentile

—

Weaknesses (CWE)

CWE-209Generation of Error Message Containing Sensitive Information

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.

Timeline

Published 2026-05-28

Modified 2026-06-03

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-9794

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Redhat Build Of Keycloak"

All exposed Redhat Build Of Keycloak instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Build Of Keycloak"

HTTP body or banner mentions "Build Of Keycloak" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-9794