CVE-2026-8830

medium Red Hat
CVSS v3 Base Score
4.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS Score
0.0%
Exploitation probability in 30 days
Top 94% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Published: May 19, 2026 (51 days ago)
Last Modified: May 19, 2026
Vendor: Red Hat
Source: REDHAT

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.

CWE

CWE-603

Affected Products

Red Hat Build of Keycloak

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov