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CVE

CVE-2026-3047

Keycloak SAML Broken has Authentication Bypass by Primary Weakness
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CVE

CVE-2026-3047

Keycloak SAML Broken has Authentication Bypass by Primary Weakness

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.

A fix is available at https://github.com/keycloak/keycloak/releases/tag/26.5.5.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-3047, https://access.redhat.com/errata/RHSA-2026:3925, https://access.redhat.com/errata/RHSA-2026:3926, https://access.redhat.com/errata/RHSA-2026:3947, https://access.redhat.com/errata/RHSA-2026:3948, https://access.redhat.com/security/cve/CVE-2026-3047, https://bugzilla.redhat.com/show_bug.cgi?id=2441966, https://github.com/keycloak/keycloak, https://github.com/keycloak/keycloak/releases/tag/26.5.5

Severity

8.8

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
8.8
EPSS Probability
0.00446%
EPSS Percentile
0.63637%
Introduced Version
0
Fix Available

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