CVE-2026-39831
Essential information
- Published
- 22/05/2026 04:16
- Modified
- 22/05/2026 04:16
- Author
- —
- Creator
- —
- CISA KEV
- No
- CWE
- —
- CVSS vector
- — — —
Description
The Verify() method for FIDO/U2F security key types ([email protected], [email protected]) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a "no-touch-required" extension in Permissions.Extensions from PublicKeyCallback.
NVD status
- Status
- Received — CVE has been recently published to the CVE List and has been received by the NVD.
- Source
- [email protected]
- NVD
- View on NVD
Affected products (CPE)
| Product | CPE |
|---|---|
| openssh / sk-ecdsa-sha2-nistp256 | cpe:2.3:a:openssh:sk-ecdsa-sha2-nistp256:*:*:*:*:*:*:*:* |
| openssh / sk-ssh-ed25519 | cpe:2.3:a:openssh:sk-ssh-ed25519:*:*:*:*:*:*:*:* |