https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-01T05:16:32.867486+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2026-39831 CVE-2026-39831 — Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh 2026-10-01T05:16:33.575275+00:00

Affected: golang.org/x/crypto/ssh

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.