This vulnerability involves an out-of-bounds write (CWE-787) in the ANGLE graphics abstraction layer within Google Chrome on Mac platforms before version 149.0.7827.53. An attacker who has compromised the renderer process could exploit this flaw via a crafted HTML page to perform a sandbox escape, potentially gaining elevated privileges or executing arbitrary code outside the browser sandbox. The CVSS 3.1 base score is 9.6 (critical), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, scope change, and high impact on confidentiality, integrity, and availability. The vulnerability is publicly disclosed and assigned CVE-2026-11043. The vendor advisory URL is provided but does not explicitly state patch or remediation details.

Successful exploitation could allow an attacker who has compromised the renderer process to escape the Chrome sandbox on Mac systems, potentially leading to arbitrary code execution with higher privileges outside the browser sandbox. This impacts confidentiality, integrity, and availability of the affected system. No known exploits in the wild have been reported at this time.

Patch status is not yet confirmed — check the vendor advisory at https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html for current remediation guidance. Until an official fix is confirmed and applied, users should exercise caution when interacting with untrusted web content and consider limiting exposure to potentially malicious HTML pages. No vendor advisory states that no action is required or that the issue is already mitigated.