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CVE-2026-39831

nvd nist
Published: May 22, 2026Modified: Jul 23, 2026

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9.1
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Exploitability: 3.9 / Impact: 5.2
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

The Verify() method for FIDO/U2F security key types (sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com) 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.

Affected (1)

Products: Golang: Crypto
Golang
1 product
Crypto
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Crypto
Before 0.52.0

Related CWEs

CWE-862
Missing Authorization
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

References (4)

Source: security@golang.org
Issue Tracking
Source: security@golang.org
Issue Tracking
Source: security@golang.org
Mailing List
Source: security@golang.org
Vendor Advisory

Timeline

No history available yet.