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Vulnerabilities

Vulnerability · 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.

Published May 14, 2026 · catalog updated Jun 17, 2026 · Yubico webauthn-server-core (aka java-webauthn-server)

Check if you run it

No confirmed exploitation is on record for CVE-2026-46419. EPSS is 0.42%. Act only if a listed version of Yubico webauthn-server-core (aka java-webauthn-server) is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Yubico webauthn-server-core (aka java-webauthn-server)).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.42%
Remediation
Advisory link
Affected products
See sources for product scope

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.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-46419

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-46419. EPSS is 0.42%. Act only if a listed version of Yubico webauthn-server-core (aka java-webauthn-server) is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-253. EPSS 0.42%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 14, 2026 · NIST NVD

    Detected

    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.

  2. Jun 17, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-46419

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-46419

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.