High severity · published Mar 5, 2026
CVE-2026-3047
Org.keycloak.broker.saml: keycloak saml broker: authentication bypass due to disabled saml client completing idp-initiated login
8.8
CVSS
0.5%
EPSS
No
On KEV
Description
A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is configured as an Identity Provider (IdP)-initiated broker landing target, it can still complete the login process and establish a Single Sign-On (SSO) session. This allows a remote attacker to gain unauthorized access to other enabled clients without re-authentication, effectively bypassing security restrictions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat build of Keycloak 26.2 · Red Hat
All versions, or not specified · source: vendor, CISA
RH
Red Hat build of Keycloak 26.4 · Red Hat
All versions, or not specified · source: vendor, CISA
BO
Build OF Keycloak · Redhat
26.2; 26.2.14; 26.4; 26.4.10 · source: NVD
KE
Keycloak · Redhat
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3047
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3047
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:3925
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:3926
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:3947
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:3948
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-3047
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2441966
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