Use of Client-Side Authentication Affecting keycloak package, versions <26.6.3-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.35% (27th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-KEYCLOAK-17209593
  • published6 Jun 2026
  • disclosed19 May 2026

Introduced: 19 May 2026

NewCVE-2026-8830  (opens in a new tab)
CWE-603  (opens in a new tab)

How to fix?

Upgrade Minimos:latest keycloak to version 26.6.3-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream keycloak package and not the keycloak package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1