CVE-2026-12468 is a race condition (CWE-362) in the updater of Google Chrome on Mac platforms before version 149.0.7827.155. An attacker with control over the renderer process can exploit this flaw via a crafted HTML page to perform a sandbox escape, potentially leading to elevated privileges or code execution outside the browser sandbox. The vulnerability has a CVSS 3.1 base score of 8.3, indicating high impact on confidentiality, integrity, and availability. No known exploits in the wild have been reported. The vendor advisory is available but does not explicitly state patch or remediation status.

Successful exploitation could allow an attacker who has already compromised the renderer process to escape the sandbox environment, potentially leading to higher privilege code execution on the host system. This elevates the risk from a renderer compromise to a broader system compromise on affected Mac versions of Chrome prior to 149.0.7827.155.

Patch status is not yet confirmed — check the vendor advisory at https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01750511403.html for current remediation guidance. Users should update to version 149.0.7827.155 or later once available to mitigate this vulnerability.