Low severity · published Apr 15, 2026
CVE-2026-40947
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
2.9
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Local
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libfido2 · Yubico
before 1.17.0 · source: vendor
PY
python-fido2 · Yubico
before 2.2.0 · source: vendor
YU
yubikey-manager · Yubico
before 5.9.1 · source: vendor