medium5.3
CVE-2026-9794
Keycloak Generates an Error Message Containing Sensitive Information
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.keycloak:keycloak-services | <= 26.4.7 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Redhat | Build Of Keycloak | All versions |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-fqjh-8322-vgrv
- https://nvd.nist.gov/vuln/detail/CVE-2026-9794
- https://access.redhat.com/security/cve/CVE-2026-9794
- https://bugzilla.redhat.com/show_bug.cgi?id=2482461
- https://access.redhat.com/errata/RHSA-2026:25098
- https://access.redhat.com/errata/RHSA-2026:25097
- https://access.redhat.com/errata/RHSA-2026:30049
- https://access.redhat.com/errata/RHSA-2026:30050
- https://github.com/keycloak/keycloak/issues/49428
- https://github.com/keycloak/keycloak/pull/49684
- https://github.com/keycloak/keycloak/pull/49686
- https://github.com/keycloak/keycloak/commit/05e98366773eec60878bb2a6d5da6bc7048ac3c8
- https://github.com/keycloak/keycloak/commit/7750e3ff823d1da8580d42c51194feb2e933b87b
- https://github.com/keycloak/keycloak/commit/dba79eb03fb9d634fda5e86e1613b8747f968518