The vulnerability identified as CVE-2026-87498 involves missing authorization checks in the WebUI component of Google Chrome before version 153.0.8010.36. An attacker who has compromised the renderer process can exploit this flaw to bypass the web origin policy by delivering a crafted HTML page. This bypass could potentially allow unauthorized access to web resources that should be restricted by origin policy enforcement. The issue is categorized under CWE-862 (Missing Authorization). No patch or official remediation details are provided in the input data.

If exploited, this vulnerability allows an attacker with control over the renderer process to bypass the web origin policy, potentially leading to unauthorized access to web content or actions that should be restricted by origin policy. This could undermine browser security boundaries and user data protection. However, the attacker must have already compromised the renderer process, which limits the initial attack vector. No known active exploitation has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users and administrators should monitor official Google Chrome security advisories for updates. Until a fix is available, limiting exposure to untrusted content and maintaining up-to-date browser versions is recommended.