CVE-2026-46419 PUBLISHED

Assigner: mitre
Reserved: 13.05.2026 Published: 14.05.2026 Updated: 14.05.2026

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

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Yubico
Product	webauthn-server-core
Versions	Default: unaffected affected from 2.8.0 to 2.8.2 (excl.)

References

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

Problem Types

CWE-253 Incorrect Check of Function Return Value CWE