CVE-2026-3009
Org.keycloak/keycloak-services: improper enforcement of disabled identity provider in identitybrokerservice (authentication bypass)
No exploitation reported by the sources we read.
- Published2026-03-05
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
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.
Timeline
dates in UTC- 2026-03-0519:16CVE publishedNVD
Versions per branch
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- keycloakBitnamifrom 26.4.0 · fixed in 26.4.1
- org.keycloak:keycloak-servicesMavenall versions · fixed in 26.5.5
Vendor advisories
org.keycloak/keycloak-services: Improper Enforcement of Disabled Identity Provider in IdentityBrokerService (Authentication Bypass)
keycloak-services as a component of Red Hat Single Sign-On 7
Red Hat Security Advisory: Red Hat build of Keycloak 26.4.10 Images Update
Red Hat Security Advisory: Red Hat build of Keycloak 26.4.10 Update
Fix
- Vendor fix Red Hat Product Security RHSA-2026:3948 · 9 productsBefore applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.
- Workaround from the vendor Red Hat Product Security RHSA-2026:3948 · 9 productsMitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
- No fix planned, says the vendor Red Hat Product Security CVE-2026-3009 · 1 productOut of support scope
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVE record2026-03-24
- OpenCVESSVC decisionnone—
- FIRST EPSSEPSS score0.5 %2026-10-22
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Published
- 2026-03-05
- Last Modified
- 2026-03-24
Frequently asked questions
What is CVE-2026-3009?
Is CVE-2026-3009 actively exploited?
What is the CVSS score for CVE-2026-3009?
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