Keycloak: keycloak: information disclosure via authorization bypass in admin api
Published Mar 12, 2026
3.1
LOWCVSS 3.1
EPSS 0.27%
Description
A flaw was found in Keycloak. An authorization bypass vulnerability in the Keycloak Admin API allows any authenticated user, even those without administrative privileges, to enumerate the organization memberships of other users. This information disclosure occurs if the attacker knows the victim's unique identifier (UUID) and the Organizations feature is enabled.
Affected products
No data.
- ≥ 26.4 · < 26.4.11
No data.
Red Hat build of Keycloak 26.4
rhbk/keycloak-operator-bundle:26.4.11-1
Fixed · RHSA-2026:6478
Red Hat build of Keycloak 26.4
rhbk/keycloak-rhel9-operator:26.4-14
Fixed · RHSA-2026:6478
Red Hat build of Keycloak 26.4
rhbk/keycloak-rhel9:26.4-14
Fixed · RHSA-2026:6478
Red Hat build of Keycloak 26.4.11
rhbk/keycloak-rhel9
Fixed · RHSA-2026:6477
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat build of Keycloak 26.4 | rhbk/keycloak-operator-bundle:26.4.11-1 | Fixed | RHSA-2026:6478 |
| Red Hat build of Keycloak 26.4 | rhbk/keycloak-rhel9-operator:26.4-14 | Fixed | RHSA-2026:6478 |
| Red Hat build of Keycloak 26.4 | rhbk/keycloak-rhel9:26.4-14 | Fixed | RHSA-2026:6478 |
| Red Hat build of Keycloak 26.4.11 | rhbk/keycloak-rhel9 | Fixed | RHSA-2026:6477 |
@keycloak/keycloak-admin-client
npm
Introduced 0 Fixed not fixedorg.keycloak:keycloak-js-admin-client
Maven
Introduced 0 Fixed not fixed
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | @keycloak/keycloak-admin-client | 0 | not fixed |
| Maven | org.keycloak:keycloak-js-admin-client | 0 | not fixed |
Remediation
Vendor solution
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Red Hat statement
This LOW impact authorization bypass in the Keycloak Admin API allows an authenticated user to enumerate organization memberships of other users if their UUID is known. This occurs when the Organizations feature is enabled.
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Mar 12, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Mar–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.27% (0.00268) | 17.17th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.27% (0.00275) | 18.98th | v5 (v2026.06.15) |
| Mar 12, 2026 | 0.03% (0.00025) | 6.58th | v4 (v2025.03.14) |
References (8)
- https://access.redhat.com/errata/RHSA-2026:6477 vendor-advisoryx_refsource_REDHATVendor Advisory
- https://access.redhat.com/errata/RHSA-2026:6478 vendor-advisoryx_refsource_REDHATVendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-2366 vdb-entryx_refsource_REDHATVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2439081 issue-trackingx_refsource_REDHATExploitIssue TrackingVendor Advisory
- https://github.com/advisories/GHSA-r8jr-wg88-fq5c Advisory
- https://github.com/keycloak/keycloak/issues/47062
- https://nvd.nist.gov/vuln/detail/CVE-2026-2366
- https://www.cve.org/CVERecord?id=CVE-2026-2366
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2026:6477 | vendor-advisoryx_refsource_REDHATVendor Advisory | |
| https://access.redhat.com/errata/RHSA-2026:6478 | vendor-advisoryx_refsource_REDHATVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2026-2366 | vdb-entryx_refsource_REDHATVendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2439081 | issue-trackingx_refsource_REDHATExploitIssue TrackingVendor Advisory | |
| https://github.com/advisories/GHSA-r8jr-wg88-fq5c | Advisory | |
| https://github.com/keycloak/keycloak/issues/47062 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2026-2366 | ||
| https://www.cve.org/CVERecord?id=CVE-2026-2366 |
Change history (0)
No recorded changes yet.