CVE-2026-3047 | Org.keycloak.broker.saml: keycloak saml broker: authentication bypass due to disabled saml client completing idp-initiated login

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: 2026-03-05 Last update: 2026-03-26 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-3047 is rated Moderate Risk (55.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.38%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-3047

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-29 0.52% 0.38% -0.14%
2 2026-04-06 0.45% 0.52% +0.07%
3 2026-03-30 — 0.45% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-3047

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]

Weakness enumeration for CVE-2026-3047

GitHub Security Advisory for CVE-2026-3047

GHSA-8cr3-vpxx-92cx · Severity: high · Ecosystem: maven — Keycloak SAML Broken has Authentication Bypass by Primary Weakness

OS Trackers for CVE-2026-3047

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2026-3047

Affected software / configurations for CVE-2026-3047

Vendor Product Version Raw CPE
redhat build_of_keycloak — cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:text-only:*:*:*
redhat build_of_keycloak 26.2 cpe:2.3:a:redhat:build_of_keycloak:26.2:*:*:*:*:*:*:*
redhat build_of_keycloak 26.2.14 cpe:2.3:a:redhat:build_of_keycloak:26.2.14:*:*:*:*:*:*:*
redhat build_of_keycloak 26.4 cpe:2.3:a:redhat:build_of_keycloak:26.4:*:*:*:*:*:*:*
redhat build_of_keycloak 26.4.10 cpe:2.3:a:redhat:build_of_keycloak:26.4.10:*:*:*:*:*:*:*
redhat keycloak — cpe:2.3:a:redhat:keycloak:-:*:*:*:*:*:*:*

References for CVE-2026-3047

cvelogic Threat Intelligence