CVE-2026-40947 - Vulnerability Details - OpenCVE

Yubico libfido2 before 1.17.0, python-fido2 before 2.2.0, and yubikey-manager before 5.9.1 have an unintended DLL search path.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Yubico	Libfido2 Python-fido2 Yubikey-manager

No data.

No data.

References

Link	Providers
https://www.yubico.com/support/security-advisories/ysa-2026-01/

History

Thu, 16 Apr 2026 14:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 16 Apr 2026 09:30:00 +0000

Type	Values Removed	Values Added
Title		Unintended DLL Search Path in Yubico Authentication Libraries
First Time appeared		Yubico Yubico libfido2 Yubico python-fido2 Yubico yubikey-manager
Vendors & Products		Yubico Yubico libfido2 Yubico python-fido2 Yubico yubikey-manager

Wed, 15 Apr 2026 23:30:00 +0000

Type	Values Removed	Values Added
Description		Yubico libfido2 before 1.17.0, python-fido2 before 2.2.0, and yubikey-manager before 5.9.1 have an unintended DLL search path.
Weaknesses		CWE-426
References		https://www.yubico.com/support/security-advisories/ysa-2026-01/
Metrics		cvssV3_1 `{'score': 2.9, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'}`

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-04-15T23:13:38.977Z

Updated: 2026-04-16T13:18:13.069Z

Reserved: 2026-04-15T23:11:52.721Z

Link: CVE-2026-40947

Vulnrichment

Updated: 2026-04-16T13:18:09.606Z

NVD

No data.

Redhat

No data.

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