Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 0.49% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2026
CVE-2026-3009High confidence
Org.keycloak/keycloak-services: improper enforcement of disabled identity provider in identitybrokerservice (authentication bypass)
Red Hat · Red Hat build of Keycloak 26.4
Official source articles: Red Hat RHSA-2026:3947 ↗ · Red Hat RHSA-2026:3948 ↗. Check the applicable product and release in the original source.
8.1HighCVSS 3.1
Within 7 days
Patch availableHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityHigh→Operational priority:High, unchanged from published severity.unchanged
Compensating controls
- Validate the affected product branch and deploy the verified fixed release.
- Restrict the affected network interface to trusted sources where business-safe.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs Red Hat Red Hat build of Keycloak 26.4 and falls inside the recorded affected range.
- Verify the installed build against the product-specific fixed version after deployment.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Open-source package ranges1 source-attributed range
These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.
| Ecosystem and package | Affected range | First fixed version | Evidence |
|---|---|---|---|
| mavenorg.keycloak:keycloak-services | < 26.5.5 | 26.5.5 | GitHub advisory ↗github reviewed aggregator · 10 Mar 2026 |
Direct vendor intelligence
1 currentAuthoritative vendor CSAF and VEX advisories
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
CVE-2026-3009 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityorg.keycloak/keycloak-services: Improper Enforcement of Disabled Identity Provider in IdentityBrokerService (Authentication Bypass)
The vendor explicitly identifies these products as affected by this CVE.
- keycloak-services as a component of Red Hat Single Sign-On 7
- Summary
- A security flaw in the IdentityBrokerService.performLogin endpoint of Keycloak allows authentication to proceed using an Identity Provider (IdP) even after it has been disabled by an administrator. An attacker who knows the IdP alias can reuse a previously generated login request to bypass the administrative restriction. This undermines access control enforcement and may allow unauthorized authentication through a disabled external provider.
- Remediation
- Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Patch available01
What, why and how
A security flaw in the IdentityBrokerService.performLogin endpoint of Keycloak allows authentication to proceed using an Identity Provider (IdP) even after it has been disabled by an administrator. An attacker who knows the IdP alias can reuse a previously generated login request to bypass the administrative restriction. This undermines access control enforcement and may allow unauthorized authentication through a disabled external provider.
What
A security flaw in the IdentityBrokerService.performLogin endpoint of Keycloak allows authentication to proceed using an Identity Provider (IdP) even after it has been disabled by an administrator. An attacker who knows the IdP alias can reuse a previously generated login request to bypass the administrative restriction. This undermines access control enforcement and may allow unauthorized authentication through a disabled external provider.
Why
The application performs an authorisation check, but it does not correctly enforce the required permission boundary.
How
An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
A security flaw in the IdentityBrokerService.performLogin endpoint of Keycloak allows authentication to proceed using an Identity Provider (IdP) even after it has been disabled by an administrator. An attacker who knows the IdP alias can reuse a previously generated login request to bypass the administrative restriction. This undermines access control enforcement and may allow unauthorized authentication through a disabled external provider.
Why
The application performs an authorisation check, but it does not correctly enforce the required permission boundary.
How
An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
- Likely attack path
- a network path → Incorrect Authorization → cause the confidentiality, integrity or availability impact described by the vendor
- Attack surface
- Network
- Privileges required
- Low: a basic authenticated account is required
- User interaction
- None
- Attack complexity
- Low: no specialised conditions are recorded
- Security boundary
- Unchanged: impact remains within the vulnerable component's security authority
- Weakness
?
CWE means Common Weakness Enumeration: a standard category for the underlying weakness. - CWE-863 ↗
CWE-863: Incorrect Authorization. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:NCommon Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.ANoneAvailability impact: No direct loss is represented by this metric.- Post-exploitation / living off the land
- No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
03
Patch and workaround
Operational remediation based on structured source evidence.
- Status
?
Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change. - Patch available
- Fixed
- rhbk/keycloak-operator-bundle@sha256:ae13f29ccde0ddf5d96d14567177fcdfa2dd12cb29ca7793b47c857436d2a3e8_amd64 as a component of Red Hat build of Keycloak 26.4
- rhbk/keycloak-rhel9-operator@sha256:2ff84fdf2ccf5ef7fb360d0b33b7369ae948b7eba84926320431adb1da23d9a7_arm64 as a component of Red Hat build of Keycloak 26.4
- rhbk/keycloak-rhel9-operator@sha256:adc45a57c1cc6f816e6c0074cd9aeba6c6b323a0c708d5d11678bb49af578a6a_amd64 as a component of Red Hat build of Keycloak 26.4
- rhbk/keycloak-rhel9-operator@sha256:cbb01b2cdd4857eddc5c94a1382c11901883d0df6176593a099d01791f6b72bf_s390x as a component of Red Hat build of Keycloak 26.4
- rhbk/keycloak-rhel9-operator@sha256:edeb162dfffdcaf118c3fa7b951a563de58a88b4604764c8651396056e6ba814_ppc64le as a component of Red Hat build of Keycloak 26.4
- rhbk/keycloak-rhel9@sha256:48fa03e7e881b996085a2207878c6ab610fa770fbedf41f195d270aefb8bf9f7_arm64 as a component of Red Hat build of Keycloak 26.4
- rhbk/keycloak-rhel9@sha256:73cf1a2410318ef2e508c21dc5c3332d3f3658eaab7d9b0e4dadfb570c002899_ppc64le as a component of Red Hat build of Keycloak 26.4
- rhbk/keycloak-rhel9@sha256:884c31d8ddfd03349a65bc76851cdf83d7cf8db0983e9e8c52a648298cd8c7eb_amd64 as a component of Red Hat build of Keycloak 26.4
- rhbk/keycloak-rhel9@sha256:b0efe038b71e19b53e41ccede51fefcd03d81e2aafd6fa0b23b5b9c8dac212fd_s390x as a component of Red Hat build of Keycloak 26.4
- Red Hat build of Keycloak 26.4.10
- Action
- Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.
- Workaround
- No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04
Evidence and provenance
Published 5 Mar 2026 · Last source change 14 Sept 2026, 12:04 UTC · CWE-863 · Incorrect Authorization
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-08-14
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2026-9863
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD modified after enrichment
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
- Affected versionsThe structured affected or fixed version information changed.CNA ↗
- Before
- See the vendor and CVE records for the affected range. · Fixed: 26.4.10-1 < *; 26.4-12 < *
- After
- See the vendor and CVE records for the affected range. · Fixed: Red Hat build of Keycloak 26.4: 26.4.10-1 < *, 26.4-12 < *
CVE published
Fixed release or patch reference recorded
Technical terms and abbreviations used in this report
- CVE
- Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
- CVSS
- Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
- EPSS
- Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
- CWE
- Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
- CNA
- CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
- CISA ADP
- Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
- NVD
- National Vulnerability Database: NIST's enrichment service for CVE records.
- CERT / CSIRT
- A computer security incident response team that publishes warnings or coordinates incident response.
- PoC
- Proof of concept: public material that demonstrates or helps reproduce exploitation.
- CSAF
- Common Security Advisory Framework: a machine-readable format for security advisories.
- LoTL
- Living off the land: abuse of legitimate tools or system functions during an attack.