VDB-363801 · CVE-2026-46419 · CNNVD-202605-3612

Yubico webauthn-server-core 2.8.0/2.8.1 function return value

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.1	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Yubico webauthn-server-core 2.8.0/2.8.1. This impacts an unknown function. Performing a manipulation results in function return value. This vulnerability is identified as CVE-2026-46419. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Yubico webauthn-server-core 2.8.0/2.8.1. This affects an unknown code. The manipulation with an unknown input leads to a function return value vulnerability. CWE is classifying the issue as CWE-253. The product incorrectly checks a return value from a function, which prevents it from detecting errors or exceptional conditions. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at yubico.com. This vulnerability is uniquely identified as CVE-2026-46419 since 05/13/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available.

Upgrading to version 2.8.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202605-3612). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Yubico

Name

webauthn-server-core

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (MITRE): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Function return value
CWE: CWE-253
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: webauthn-server-core 2.8.2

Timelineinfo

05/13/2026 CVE reserved
05/14/2026 +1 days Advisory disclosed
05/14/2026 +0 days VulDB entry created
05/18/2026 +4 days VulDB entry last update

Sourcesinfo

Advisory: yubico.com
Status: Confirmed

CVE: CVE-2026-46419 (🔒)
GCVE (CVE): GCVE-0-2026-46419
GCVE (VulDB): GCVE-100-363801
CNNVD: CNNVD-202605-3612 - java-webauthn-server 安全漏洞

Entryinfo

Created: 05/14/2026 05:57
Updated: 05/18/2026 04:04
Changes: 05/14/2026 05:57 (63), 05/15/2026 21:02 (6), 05/16/2026 16:47 (1), 05/18/2026 04:04 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.