CVE-2026-39831

9.1 Critique

Publiée le 22/05/2026 à 06:16 · Modifiée le 23/07/2026 à 18:10 · Analysée par le NVD · Source : security@golang.org

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.

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Produits concernés

golang.org/x/crypto/ssh
Golang crypto

Scores CVSS

Version	Score	Source	Vecteur
3.1	9.1 Critique	134c704f-9b21-4f2e-91b3-4a467353bcc0	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

Faiblesses (CWE)

CWE-862

Références

https://go.dev/cl/781662 Issue Tracking
https://go.dev/issue/79566 Issue Tracking
https://groups.google.com/g/golang-announce/c/a082jnz-LvI Mailing List
https://pkg.go.dev/vuln/GO-2026-5019 Vendor Advisory

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories