🛡️ CVE-2026-8830
🟡 CVSS 4.3 — Medium ✅ No Known Exploit CWE-603 NVD
4.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 4.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE CWE-603
Public Exploit ✅ No
Source NVD
Published 2026-05-19
Updated 2026-06-11
Modified 2026-06-10
Fix URL N/A

Affected Packages

Software From version Fixed in
build-of-keycloak — —
org.keycloak:keycloak-services — 26.6.3
unknown — —

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