Pass the Passkey: A Novel Attack Surface in Passwordless Authentication
Security researchers have uncovered new attack vectors targeting passwordless authentication systems, specifically Google's synced passkey ecosystem. The research demonstrates how malware can bypass user verification and extract private keys, challenging the perceived invulnerability of passkeys.
Why it matters
As passkeys replace traditional passwords, understanding these new attack surfaces is critical for maintaining the security of global authentication infrastructure.
This article analyzes new attack classes against passwordless authentication, focusing on Google’s synced passkey ecosystem and the Cloud Authenticator used by desktop clients. The attacks demonstrate how malware on a compromised endpoint can misuse onboarding, recovery and device trust workflows to take over passkey-protected accounts. We show how an attacker can authenticate without user interaction, bypass user verification requirements and extract all synced passkey private keys.
After decades of breaches and billions in losses, the attack vectors that defined the era of passwords and shared secrets are finally starting to fade. Passkeys replace passwords and traditional multi-factor authentication (MFA) with public-key cryptography, decreasing entire classes of attacks that have dominated the threat landscape for years.
With no shared secret to steal, reuse or phish, many of an attacker’s most reliable tools are becoming obsolete. This represents a significant disruption for the credential theft market.
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