Vulnerability in Red Hat Build Of Keycloak 26.2
CVE-2026-3047
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (58.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.009 · change: +0.004
Affected products
- Red Hat Build Of Keycloak 26.2 — versions 26.2.14-1, 26.2-16
- Red Hat Build Of Keycloak 26.2.14
- Red Hat Build Of Keycloak 26.4 — versions 26.4.10-1, 26.4-12
- Red Hat Build Of Keycloak 26.4.10
- Red Hat Build Of Keycloak — versions 26.2, 26.2.14, 26.4
- Red Hat Keycloak
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2026:3925 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:3926 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:3947 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:3948 (vendor-advisory, Vendor Advisory)
- access.redhat.com/security/cve/CVE-2026-3047 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking, Vendor Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-3047?
- CVE-2026-3047 is a high-severity vulnerability in Red Hat Build Of Keycloak 26.2, classified under Authentication Bypass by Primary Weakness. CVSS score: 8.8/10. Published 2026-03-05.
- How severe is CVE-2026-3047?
- High severity. CVSS v3 base score is 8.8 out of 10.