What’s Vulnerable › Vulnerabilities
CVE-2026-40947
- Severity: low (CVSS 2.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-16 · updated 2026-10-26
- Weakness: CWE-426
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.
Affected products
- Yubico libfido2: before 1.17.0 — fixed in 1.17.0
- Yubico python-fido2: before 2.2.0 — fixed in 2.2.0
- Yubico yubikey-manager: before 5.9.1 — fixed in 5.9.1
How to fix
Upgrade to a fixed version: Yubico libfido2 1.17.0; Yubico python-fido2 2.2.0; Yubico yubikey-manager 5.9.1. Check the vendor advisory for mitigations.
References
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