CVE-2026-3047
This allows a remote attacker to gain unauthorized access to other enabled clients without re-authentication, effectively bypassing security restrictions.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.47% probability · 39th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-305
- Affected
- redhat/build of keycloak · redhat/keycloak
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHSA-2026:3925Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:3926Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:3947Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:3948Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-3047Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2441966Issue Tracking, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:3925Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:3926Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:3947Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:3948Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-3047Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2441966Issue Tracking, Vendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3047.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.