Google Password Manager Attacks Could Let Malware Hijack Passkey-Protected Accounts
thehackernews.com Aug 3, 2026

Google Password Manager Attacks Could Let Malware Hijack Passkey-Protected Accounts

AI-summarised brief · reviewed before publication

Researchers at Unit 42 have identified three post‑compromise techniques—Pass‑ta‑key, Silver Pass‑ta‑key and Golden Pass‑ta‑key—that allow malware running under a standard user account on Windows to authenticate to passkey‑protected services via Chrome’s Google Password Manager without any user interaction. The methods exploit how Chrome stores device keys, re‑enrolls devices, and how relying parties verify user presence. Pass‑ta‑key extracts a wrapped TPM‑derived device identity key and generates a valid assertion with the user‑verified flag unset; Silver Pass‑ta‑key forces a re‑enrollment window to inject an attacker‑controlled verification key; Golden Pass‑ta‑key reads the 32‑byte Security Domain Secret used to decrypt synced private keys. All attacks require initial malware access, do not break cryptography, and can yield reusable authentication tokens or decryption material. No CVEs have been assigned, and remediation status remains unclear.

💡 Why It Matters

  • · By bypassing user‑verification checks, these techniques let attackers silently hijack accounts that owners believed were protected by hardware‑backed passkeys, exposing a critical gap between credential storage and site‑level verification.