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CVE Record

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.

HighCVSS 8.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2026-3047 is an authentication bypass in Red Hat build of Keycloak SAML brokering. A disabled SAML client can still complete an IdP-initiated login path and create an SSO session, potentially giving access to other enabled clients without re-authentication.

Executive priority

Treat as high priority for identity infrastructure. Keycloak often protects multiple internal and customer-facing applications, so bypassing client disablement can undermine access control decisions across connected services.

Technical view

The flaw is in org.keycloak.broker.saml. When a disabled SAML client is configured as an IdP-initiated broker landing target, Keycloak can still finish login and establish SSO. Red Hat rates it High with CVSS 8.8, network attack vector, low complexity, and privilege required.

Likely exposure

Exposure is likely limited to Red Hat build of Keycloak 26.2 and 26.4 deployments using SAML brokering with IdP-initiated login and disabled clients configured as broker landing targets.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector indicates remote exploitation with low complexity but requires some privileges.

Researcher notes

Focus validation on SAML broker flows, disabled client state enforcement, and IdP-initiated login handling. Do not assume all Keycloak products are affected; the provided evidence names specific Red Hat build streams and packages.

Mitigation direction

  • Apply the relevant Red Hat security advisory for the installed Keycloak stream.
  • Move affected deployments to vendor-listed unaffected builds where applicable.
  • Review disabled SAML clients used as IdP-initiated broker landing targets.
  • Follow Red Hat CVE and errata guidance for any configuration-specific mitigations.

Validation and detection

  • Inventory Red Hat build of Keycloak 26.2 and 26.4 deployments.
  • Check installed package versions against Red Hat affected and unaffected entries.
  • Review SAML identity provider broker settings for IdP-initiated landing targets.
  • Confirm disabled SAML clients cannot complete login or create SSO sessions.
  • Review authentication logs for unexpected SSO sessions involving disabled clients.
Prepared
Confidence
high
Sources
9

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2026-3047 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
7Timeline events
2ADP providers
8Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: total

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.8CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9redhat
8.8CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

8.8High
CVSS 3.1 vector shape for CVE-2026-3047Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. ADP timelineredhat-SADP

    Reported to Red Hat.

  2. Source timelineredhat

    Reported to Red Hat.

  3. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  4. ADP timelineredhat-SADP

    Made public.

  5. Source timelineredhat

    Made public.

  6. CVE publishedCVE Program

    The CVE record was published.

  7. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPorg.keycloak.broker.saml: Keycloak SAML broker: Authentication bypass due to disabled SAML client completing IdP-initiated login
other:Red Hat severity ratingcvssV3_1
  • 2026-02-23T17:29:50.192Z: Reported to Red Hat.
  • 2026-03-05T11:24:00.000Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Red HatRed Hat build of Keycloak 26.2rhbk/keycloak-operator-bundle, 26.2.14-1affected
Red HatRed Hat build of Keycloak 26.2rhbk/keycloak-rhel9, 26.2-16affected
Red HatRed Hat build of Keycloak 26.2rhbk/keycloak-rhel9-operator, 26.2-16affected
Red HatRed Hat build of Keycloak 26.2.14rhbk/keycloak-rhel9unaffected
Red HatRed Hat build of Keycloak 26.4rhbk/keycloak-operator-bundle, 26.4.10-1affected
Red HatRed Hat build of Keycloak 26.4rhbk/keycloak-rhel9, 26.4-12affected
Red HatRed Hat build of Keycloak 26.4rhbk/keycloak-rhel9-operator, 26.4-12affected
Red HatRed Hat build of Keycloak 26.4.10rhbk/keycloak-rhel9unaffected
Weakness

CWE details

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CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-305 · source CWE mapping

Authentication Bypass by Primary Weakness

Authentication Bypass by Primary Weakness represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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