How severe is CVE-2026-46419?

CVE-2026-46419 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-46419 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-46419?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-46419 have an EU (EUVD) identifier?

Yes. CVE-2026-46419 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30211.

When was CVE-2026-46419 published?

CVE-2026-46419 was published on 2026-05-14 and last updated on 2026-06-17.

CVE-2026-46419

CVE-2026-46419 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-253.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30211
Weakness: CWE-253
Published: 2026-05-14
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-46419?: CVE-2026-46419 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-46419 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-46419?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-46419 have an EU (EUVD) identifier?: Yes. CVE-2026-46419 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30211.
When was CVE-2026-46419 published?: CVE-2026-46419 was published on 2026-05-14 and last updated on 2026-06-17.

References

Other CWE-253 vulnerabilities

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