CVE-2026-8830

Low

No strong exploitation signal.

CVSS base

4.3 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

EPSS — probability of exploitation (30 days)

0.4%

33.1th percentile

CISA KEV

Not listed

Weakness / dates

CWE-603

Published 2026-05-19 · modified 2026-07-23

CVSS breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector	N	Network
Attack Complexity	L	Low
Privileges Required	L	Low
User Interaction	N	None
Scope	U	Unchanged
Confidentiality	N	None
Integrity	L	Low
Availability	N	None

Timeline

2026-05-19 — Published (NVD)
2026-07-23 — Last modified (NVD)

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.

Affected

redhat

References

Official: NVD · CVE.org