Medium 5.3Published May 27, 2026

CVE-2026-9794Keycloak: keycloak: information disclosure via saml ecp endpoint

Updated under an hour ago (Oct 26, 2026, 2:23 PM ET)

Does this affect you?

It affects Red Hat build of Keycloak 26.4 and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat build of Keycloak 26.4

Exploited in the last 30 days

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: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-209
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Jun 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat build of Keycloak 26.4 redhat:build_keycloak	from 26.4.13-1 not affected	CNA record
redhat build_of_keycloak redhat:build_of_keycloak	all versions	NVD

References

References

https://access.redhat.com/errata/RHSA-2026:25097	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:25098	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:30049	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:30050	vendor-advisory, x-refsource-redhat
https://access.redhat.com/security/cve/CVE-2026-9794	vdb-entry, x-refsource-redhat, vendor-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2482461	issue-tracking, x-refsource-redhat, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.