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CVE-2026-2366

Keycloak: keycloak: information disclosure via authorization bypass in admin api

3.1 LowFix available

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

0.30%Up 0.3 points since Mar 12, 2026
90%50%10%1%

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 LowCVSS: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 LowCVSS: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 LowCVSS: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 LowCVSS: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 LowCVSS: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

Affected packages
PackageAffectedFixed
@keycloak/keycloak-admin-client
npm
through 26.5.5 None known
org.keycloak:keycloak-js-admin-client
Maven
through 26.5.5 None known
keycloak
Bitnami
26.4.0 up to 26.4.11
26.4.11
org.keycloak:keycloak-js-admin-client
Maven
through 26.5.5, plus listed versions
26.3.026.3.126.3.226.3.326.3.4
Show 14 moreShow less
26.3.526.4.026.4.126.4.226.4.326.4.426.4.526.4.626.4.726.5.026.5.126.5.226.5.326.5.4
None known

History

History
RecordedChangedSources
first indexedCVE 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

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