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CVE-2026-37978— Keycloak: org.keycloak.services: keycloak: information disclosure via evaluate-scopes 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，该漏洞源于具有view-clients角色的低权限管理员可以通过调用evaluate-scopes管理API端点并传入任意用户ID参数，可能导致跨角色个人身份信息泄露。

CVSS 4.9 · Medium EPSS 0.46% · P38

Possible ATT&CK Techniques 2 AI

T1530.003 T1530 · Data from Cloud Storage

Affected Version Matrix 4

VendorProduct Version RangeStatus
Red Hat Red Hat build of Keycloak 26.4 26.4.12-1< * unaffected
26.4-17< * unaffected
26.4-17< * unaffected
Red Hat Red Hat build of Keycloak 26.4.12 any unaffected
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I. Basic Information for CVE-2026-37978

Vulnerability Information
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Vulnerability Title
Keycloak: org.keycloak.services: keycloak: information disclosure via evaluate-scopes admin api
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak. A low-privilege administrator with the 'view-clients' role can exploit this by invoking the 'evaluate-scopes' Admin API endpoints with an arbitrary user ID (userId) parameter. This vulnerability allows for cross-role personally identifiable information (PII) leakage, enabling unauthorized visibility into user identities and authorizations across the realm. Exploitation is possible remotely via network access to the Admin API.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/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，该漏洞源于具有view-clients角色的低权限管理员可以通过调用evaluate-scopes管理API端点并传入任意用户ID参数，可能导致跨角色个人身份信息泄露。
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 26.4.12-1 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4 26.4-17 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4 26.4-17 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4.12 - cpe:/a:redhat:build_keycloak:26.4::el9

II. Public POCs for CVE-2026-37978

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III. Intelligence Information for CVE-2026-37978

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Vendor Advisories for CVE-2026-37978 (4)

Same Patch Batch · Red Hat · 2026-05-19 · 10 CVEs total

CVE-2026-7504 8.1 HIGH Org.keycloak/keycloak-services: open redirect when using wildcard valid redirect uris in k
CVE-2026-7507 7.5 HIGH Org.keycloak/keycloak-services: session fixation in oidc login flow that can lead to accou
CVE-2026-7571 7.1 HIGH Keycloak: keycloak: access token disclosure and implicit flow bypass via forged client dat
CVE-2026-4630 6.8 MEDIUM Keycloak: keycloak: unauthorized resource access and data modification via insecure direct
CVE-2026-37982 6.8 MEDIUM Keycloak: org.keycloak.authentication: keycloak: unauthorized account takeover via webauth
CVE-2026-37979 6.5 MEDIUM Keycloak: keycloak: information disclosure via oidc token introspection endpoint audience
CVE-2026-8922 5.4 MEDIUM Org.keycloak/keycloak-services: keycloak: org.keycloak.protocol.oidc: security flaw in org
CVE-2026-8830 4.3 MEDIUM Keycloak: org.keycloak/keycloak-services: keycloak: policy bypass during webauthn credenti
CVE-2026-37981 4.3 MEDIUM Keycloak: org.keycloak.authorization: keycloak: information disclosure via broken access c

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-37978

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