CVE-2026-9794

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 71/100
Published: 2026-05-28 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: Low
I: None
A: None

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
redhat build_of_keycloak -

Bug Bounty Relevance

71 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

5.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploitation Probability

0.44%
Raw Score 0.004360
Percentile 37.9%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00436
2026-10-28
0.00436

Intelligence Sources

nvd ref →