Cookie Encryption Bypass in Google Chrome Affecting AppBound Mechanism

CVE-2025-34092

What is CVE-2025-34092?

A cookie encryption bypass vulnerability exists within Google Chrome's AppBound mechanism, stemming from inadequate path validation logic in the elevation service. When a cookie key is encrypted, Chrome stores its executable path as metadata for validation. During decryption, this path is checked against the incoming process's path. An attacker can exploit inconsistencies in path canonicalization by creating a malicious executable named 'chrome.exe' in a similar directory, potentially allowing unauthorized access to encrypted cookies intended specifically for the Chrome process. Other Chromium-based browsers may also be susceptible if they employ similar encryption methods.

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