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Google Chrome AppBound Encryption Downgrade and Authentication Bypass

severity
critical
date
Affecting

  • Chrome 127 - 129

  • Confirmed in Google Chrome with AppBound Encryption enabled.

  • Other Chromium-based browsers may be affected if they implement similar COM-based encryption mechanisms.

CVE
CVE-2025-34090, CVE-2025-34091, CVE-2025-34092
CVE type
Protection Mechanism Failure
CVSS
9
CVSS V4 Vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Credit
Ari Novick of CyberArk