LOW
CVE-2026-40947
CWE-426Published: April 16, 2026· Updated: Apr 17, 2026
2.9
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:1.8th
Official 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.
Technical Analysis
CVE-2026-40947 requires local access, meaning attackers must already have a foothold on the target system.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected Vendors & Products
Mentioned vendors (from description):
Python
CPE data not yet available in NVD for this CVE.
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
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GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
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PacketStorm
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NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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All References (1)
Quick Facts
CVE IDCVE-2026-40947
CVSS Score2.9 / 10
SeverityLOW
WeaknessCWE-426
CISA KEVNo
EPSS (30d)0.01%
PublishedApr 16, 2026
Related CVEs (CWE-426)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-40947 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.