CVE-2026-46419

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

14/05/2026

Last modified:

14/05/2026

Description

Yubico webauthn-server-core (aka java-webauthn-server) 2.8.0 before 2.8.2 incorrectly checks a function&#39;s return value in the second factor flow, leading to impersonation.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

https://github.com/Yubico/java-webauthn-server/releases/tag/2.8.2
https://www.yubico.com/support/security-advisories/ysa-2026-02/