CVE-2026-46419

Impersonation Vulnerability in Yubico WebAuthn Server Core 2.8.0–2.8.1

Published May 14, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Yubico
Yubico webauthn-server-core
Vendors & Products Yubico
Yubico webauthn-server-core
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Impersonation Vulnerability in Yubico WebAuthn Server Core 2.8.0–2.8.1
Type Values Removed Values Added
Description 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.
Weaknesses CWE-253
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
May 14, 2026, 1:52 PM
Reserved
May 13, 2026, 12:00 AM
Status
Deferred
Published
May 14, 2026, 2:17 AM
Modified
Oct 26, 2026, 2:10 PM