Riskcovery

CVE-2026-8830

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

State
Published
Severity
4.3 Medium
Published
May 19, 2026
Updated
Jun 26, 2026
Reserved
May 18, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.14.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nredhat

Weaknesses

  • CWE-603 Use of Client-Side Authentication

Affected Products

ProductVersions
Red Hat build of Keycloak 26.4Red Hat
  • 26.4.13-1 and laterNot affected
Red Hat build of Keycloak 26.4Red Hat
  • 26.4-19 and laterNot affected
Red Hat build of Keycloak 26.4Red Hat
  • 26.4-19 and laterNot affected
Red Hat build of Keycloak 26.4.13Red Hat
    Red Hat build of Keycloak 26.6Red Hat
    • 26.6.3-3 and laterNot affected
    Red Hat build of Keycloak 26.6Red Hat
    • 26.6-6 and laterNot affected
    Red Hat build of Keycloak 26.6Red Hat
    • 26.6-6 and laterNot affected
    Red Hat build of Keycloak 26.6.3Red Hat

      References

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