Skip to content
OpenAdvisories
Medium · 5.3 Public exploit CVE-2026-9794 EUVD-2026-32709GHSA-fqjh-8322-vgrv

Keycloak: keycloak: information disclosure via saml ecp endpoint

Published May 28, 2026 · Updated Jun 26, 2026 · Assigned by redhat

Vendor: Red Hat Product: Red Hat build of Keycloak 26.4 Product: Red Hat build of Keycloak 26.4.13 Product: Red Hat build of Keycloak 26.6 Product: Red Hat build of Keycloak 26.6.3 Package: keycloak-26.4-iamguarded-compat Package: keycloak-26.5 Package: keycloak-26.5-iamguarded-compat Package: org.keycloak:keycloak-services Ecosystem: Maven Ecosystem: Wolfi

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.

Affected products

VendorProductAffectedFixed
Red Hat Red Hat build of Keycloak 26.4 — —
Red Hat Red Hat build of Keycloak 26.4.13 — —
Red Hat Red Hat build of Keycloak 26.6 — —
Red Hat Red Hat build of Keycloak 26.6.3 — —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling keycloak-26.5 +2 No fix yet —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Affected packages

EcosystemPackageAffectedFixedRecord
Maven org.keycloak:keycloak-services <= 26.4.7 — GHSA-fqjh-8322-vgrv
Maven org.keycloak:keycloak-services >= 26.5.0, < 26.6.3 26.6.3 GHSA-fqjh-8322-vgrv

Advisories 1

References