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CVE-2026-8830— Keycloak: org.keycloak/keycloak-services: keycloak: policy bypass during webauthn credential registration via client-side javascript manipulation

CVSS 4.3 · Medium EPSS 0.02% · P6

Affected Version Matrix 1

VendorProductVersion RangeStatus
Red HatRed Hat Build of Keycloakanyaffected
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I. Basic Information for CVE-2026-8830

Vulnerability Information
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Vulnerability Title
Keycloak: org.keycloak/keycloak-services: keycloak: policy bypass during webauthn credential registration via client-side javascript manipulation
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction() fails to validate that the newly created credential's parameters, such as public key algorithms, match the realm's configured WebAuthn policies. This could lead to the creation of credentials that do not adhere to administrative security requirements, potentially weakening the overall security posture of the system by allowing non-compliant authentication methods.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用客户端的认证机制
Source: NVD (National Vulnerability Database)
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，该漏洞源于服务端processAction未验证新凭证参数，可能导致绕过WebAuthn策略创建不合规凭证。
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

VendorProductAffected VersionsCPESubscribe
Red HatRed Hat Build of Keycloak-cpe:/a:redhat:build_keycloak:

II. Public POCs for CVE-2026-8830

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III. Intelligence Information for CVE-2026-8830

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Vendor Advisories for CVE-2026-8830 (2)

Same Patch Batch · Red Hat · 2026-05-19 · 11 CVEs total

CVE-2026-75048.1 HIGHOrg.keycloak/keycloak-services: open redirect when using wildcard valid redirect uris in k
CVE-2026-75077.5 HIGHOrg.keycloak/keycloak-services: session fixation in oidc login flow that can lead to accou
CVE-2026-73077.5 HIGHKeycloak: keycloak: denial of service via specially crafted saml input
CVE-2026-75717.1 HIGHKeycloak: keycloak: access token disclosure and implicit flow bypass via forged client dat
CVE-2026-379826.8 MEDIUMKeycloak: org.keycloak.authentication: keycloak: unauthorized account takeover via webauth
CVE-2026-46306.8 MEDIUMKeycloak: keycloak: unauthorized resource access and data modification via insecure direct
CVE-2026-379796.5 MEDIUMKeycloak: keycloak: information disclosure via oidc token introspection endpoint audience
CVE-2026-89225.4 MEDIUMOrg.keycloak/keycloak-services: keycloak: org.keycloak.protocol.oidc: security flaw in org
CVE-2026-379784.9 MEDIUMKeycloak: org.keycloak.services: keycloak: information disclosure via evaluate-scopes admi
CVE-2026-379814.3 MEDIUMKeycloak: org.keycloak.authorization: keycloak: information disclosure via broken access c

IV. Related Vulnerabilities

Same product: Red Hat Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-603

V. Comments for CVE-2026-8830

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