MEDIUM 5.3 Maven
Keycloak Generates an Error Message Containing Sensitive Information
GHSA-fqjh-8322-vgrv · CVE-2026-9794
Published · Modified
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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.
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-9794
- WEB https://github.com/keycloak/keycloak/issues/49428
- WEB https://github.com/keycloak/keycloak/pull/49684
- WEB https://github.com/keycloak/keycloak/pull/49686
- WEB https://github.com/keycloak/keycloak/commit/05e98366773eec60878bb2a6d5da6bc7048ac3c8
- WEB https://github.com/keycloak/keycloak/commit/7750e3ff823d1da8580d42c51194feb2e933b87b
- WEB https://github.com/keycloak/keycloak/commit/dba79eb03fb9d634fda5e86e1613b8747f968518
- WEB https://access.redhat.com/errata/RHSA-2026:25097
- WEB https://access.redhat.com/errata/RHSA-2026:25098
- WEB https://access.redhat.com/errata/RHSA-2026:30049
- WEB https://access.redhat.com/errata/RHSA-2026:30050
- WEB https://access.redhat.com/security/cve/CVE-2026-9794
- WEB https://bugzilla.redhat.com/show_bug.cgi?id=2482461
- PACKAGE https://github.com/keycloak/keycloak
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