Vulnerability in Yubico Webauthn-server-core

CVE-2026-46419

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.

EPSS: 0.000 (3.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-46419?
CVE-2026-46419 is a high-severity vulnerability in Yubico Webauthn-server-core, classified under CWE-253. CVSS score: 7.5/10. Published 2026-05-14.
How severe is CVE-2026-46419?
High severity. CVSS v3 base score is 7.5 out of 10.