CVE-2026-9794
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.
- CVSS 3.1
- 5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)
- CWE
- CWE-209
- Published
- Modified
- Record from
- the NVD, synced
Affected
- redhat:build_of_keycloak
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-fqjh-8322-vgrv | Maven | org.keycloak:keycloak-services | <=26.4.7 | no fix published |
| GHSA-fqjh-8322-vgrv | Maven | org.keycloak:keycloak-services | >=26.5.0 <26.6.3 | 26.6.3 |