PT-2026-40845 · Yubico · Webauthn-Server-Core

Philsmart · Published 2026-05-14 · Updated 2026-05-14 · CVE-2026-46419

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Yubico webauthn-server-core versions 2.8.0 through 2.8.1

Description The software incorrectly checks a function's return value during the second factor flow, which can lead to impersonation.

Recommendations Update to version 2.8.2.

Exploit

Fix

Weakness Enumeration

CWE-253

Related Identifiers

CVE-2026-46419

Affected Products

Webauthn-Server-Core

References · 9

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46419.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-46419 · Security Note
• https://osv.dev/vulnerability/CVE-2026-46419 · Vendor Advisory
• https://github.com/Yubico/java-webauthn-server/releases/tag/2.8.2 · Note
• https://yubico.com/support/security-advisories/ysa-2026-02 · Note
• https://t.me/cveNotify/163392 · Telegram Post
• https://t.me/cveNotify/163391 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2054760477519937898 · Twitter Post
• https://t.me/CVEtracker/53733 · Telegram Post