CVE-2026-9794
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4.13-1 < * | unaffected |
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-19 < * | unaffected |
| Red Hat | Red Hat build of Keycloak 26.4 | 26.4-19 < * | unaffected |
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6.3-3 < * | unaffected |
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-6 < * | unaffected |
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-6 < * | unaffected |
Weaknesses
- CWE-209: Generation of Error Message Containing Sensitive Information
Workarounds
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://access.redhat.com/errata/RHSA-2026:25097
- https://access.redhat.com/errata/RHSA-2026:25098
- https://access.redhat.com/errata/RHSA-2026:30049
- https://access.redhat.com/errata/RHSA-2026:30050
- https://access.redhat.com/security/cve/CVE-2026-9794
- https://bugzilla.redhat.com/show_bug.cgi?id=2482461
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.