CVE-2026-2366 json
Keycloak: keycloak: information disclosure via authorization bypass in admin api
published 2026-03-12 7 mo ago modified 2026-09-08 2 mo ago also BIT-keycloak-2026-2366 , EUVD-2026-11553 , GHSA-r8jr-wg88-fq5c
- cvss
- 3.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bitnami keycloak 26.4.11
- Red Hat Red Hat build of Keycloak 26.4 26.4-14, 26.4.11-1
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-2366 updated cvss 3.1
keycloak: Keycloak: Information disclosure via authorization bypass in Admin API
-
Red Hat build of Keycloak 26.4 rhbk/keycloak-rhel9 26.4-14, rhbk/keycloak-rhel9-operator 26.4-14, rhbk/keycloak-operator-bundle 26.4.11-1fixed: vendor fix RHSA-2026:6478
-
Red Hat build of Keycloak 26.4.11fixed: vendor fix RHSA-2026:6477
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2439081 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |
| OSV | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @keycloak/keycloak-admin-client | <=26.5.5 |
no fix listed |
| maven | org.keycloak:keycloak-js-admin-client | <=26.5.5 |
no fix listed |
| bitnami | keycloak | >=26.4.0, <26.4.11 |
26.4.11 |
Affected products
- Red Hat Red Hat build of Keycloak 26.4
- Red Hat Red Hat build of Keycloak 26.4.11
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
bugzilla.redhat.com
/show_bug.cgi?id=2439081
issue-tracking, web, exploit, vendor-advisory, advisory
-
access.redhat.com
/errata/RHSA-2026:6477
vendor-advisory, web, advisory
-
access.redhat.com
/errata/RHSA-2026:6478
vendor-advisory, web, advisory
-
access.redhat.com
/security/cve/CVE-2026-2366
vdb-entry, web, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-2366
advisory, web
-
github.com
/keycloak/keycloak/issues/47062
web
-
github.com
/keycloak/keycloak
package
Sources
- CVE List CVE-2026-2366
- GitHub Advisory GHSA-r8jr-wg88-fq5c
- NVD CVE-2026-2366
- OSV BIT-keycloak-2026-2366
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