CVE-2026-19177 is a vulnerability in Google Chrome before version 151.0.7922.109 caused by insufficient validation of untrusted input in the user interface. An attacker who has already compromised the renderer process can exploit this flaw to perform a sandbox escape by using a specially crafted HTML page. The sandbox escape could lead to elevated privileges and broader system compromise. The vulnerability is rated high severity with a CVSS 3.1 score of 8.3, reflecting network attack vector, high impact on confidentiality, integrity, and availability, and requiring user interaction with high attack complexity.

Successful exploitation allows a remote attacker with control over the renderer process to escape the sandbox protections of Google Chrome. This can lead to full compromise of the browser environment and potentially the underlying system, affecting confidentiality, integrity, and availability.

A fix is available in Google Chrome version 151.0.7922.109. Users and administrators should update to this version or later to remediate the vulnerability. No additional mitigation guidance is provided or required beyond applying the official patch.