CVE-2026-2366
Keycloak: keycloak: information disclosure via authorization bypass in admin api
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
3.1
Keycloak: keycloak: information disclosure via authorization bypass in admin api
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.
- Record
CVE-2026-2366- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-639
- Updated
- 2026-11-02
EUVDEUVD-2026-11553
3.1
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.
- Record
EUVD-2026-11553- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-r8jr-wg88-fq5c
3.1
Keycloak vulnerable to authorization bypass via the Admin API
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.
- Record
GHSA-r8jr-wg88-fq5c- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-639
- Updated
- 2026-11-02
NVD
3.1
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.
- Record
CVE-2026-2366- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-639
- Updated
- 2026-11-02
OSVGHSA-r8jr-wg88-fq5c
3.1
Keycloak vulnerable to authorization bypass via the Admin API
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.
- Record
GHSA-r8jr-wg88-fq5c- CVSS 3.1
- 3.1 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-639
- Updated
- 2026-11-02
OSVBIT-keycloak-2026-2366 No score
Keycloak: keycloak: information disclosure via authorization bypass in admin api
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.
- Record
BIT-keycloak-2026-2366- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
@keycloak/keycloak-admin-clientnpm |
through 26.5.5 | None known |
org.keycloak:keycloak-js-admin-clientMaven |
through 26.5.5 | None known |
keycloakBitnami |
26.4.0 up to 26.4.11 | 26.4.11 |
org.keycloak:keycloak-js-admin-clientMaven |
through 26.5.5, plus listed versions 26.3.026.3.126.3.226.3.326.3.4 Show 14 moreShow less26.3.526.4.026.4.126.4.226.4.326.4.426.4.526.4.626.4.726.5.026.5.126.5.226.5.326.5.4 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-2366 is a low vulnerability (CVSS 3.1) in Red Hat Build Of Keycloak 26.4, published March 12, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 22nd percentile. Fixed in keycloak 26.4.11.
References
access.redhat.com/errata/RHSA-2026:6477
access.redhat.com/errata/RHSA-2026:6478
access.redhat.com/security/cve/CVE-2026-2366
bugzilla.redhat.com/show_bug.cgi?id=2439081
nvd.nist.gov/vuln/detail/CVE-2026-2366
github.com/keycloak/keycloak/issues/47062
github.com/advisories/GHSA-r8jr-wg88-fq5c
github.com/keycloak/keycloak