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CVE-2026-2366— Keycloak: keycloak: information disclosure via authorization bypass in admin api

Quick assessment

Affected
Red Hat Red Hat build of Keycloak 26.4
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Keycloak是Keycloak开源的一种开源身份和访问管理解决方案。 Keycloak存在安全漏洞，该漏洞源于Admin API中存在授权绕过，可能导致信息泄露。

CVSS 3.1 · Low EPSS 0.27% · P17
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I. Basic Information for CVE-2026-2366

Vulnerability Information
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Vulnerability Title
Keycloak: keycloak: information disclosure via authorization bypass in admin api
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
Keycloak 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak开源的一种开源身份和访问管理解决方案。 Keycloak存在安全漏洞，该漏洞源于Admin API中存在授权绕过，可能导致信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat build of Keycloak 26.4 26.4.11-1 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4 26.4-14 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4 26.4-14 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4.11 - cpe:/a:redhat:build_keycloak:26.4::el9

II. Public POCs for CVE-2026-2366

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III. Intelligence Information for CVE-2026-2366

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Vendor Advisories for CVE-2026-2366 (4)

Same Patch Batch · Red Hat · 2026-03-12 · 4 CVEs total

CVE-2026-3099 5.8 MEDIUM Libsoup: libsoup: authentication bypass via digest authentication replay attack
CVE-2026-2376 4.9 MEDIUM Mirror-registry: quay: quay: server-side request forgery via open redirect vulnerability i
CVE-2026-3234 4.3 MEDIUM Mod_proxy_cluster: mod_proxy_cluster: response body corruption via crlf injection

IV. Related Vulnerabilities

Same product: Red Hat build of Keycloak 26.4
Same vendor: Red Hat
Same weakness: CWE-639

V. Comments for CVE-2026-2366

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