CVE-2026-11269 describes a vulnerability in Google Chrome's Extensions implementation before version 149.0.7827.53. This flaw allows an attacker positioned on a privileged network to execute arbitrary code within a sandbox environment by leveraging a specially crafted Chrome Extension. The vulnerability is classified under CWE-829 (Inclusion of Functionality from Untrusted Control Sphere). The CVSS 3.1 vector indicates the attack requires network access with high attack complexity, no privileges, and user interaction, but results in high confidentiality, integrity, and availability impact. Although a vendor advisory link is provided, it does not explicitly state if the issue is fixed or mitigated in the referenced update.

Successful exploitation could allow an attacker on a privileged network to execute arbitrary code inside the Chrome sandbox, potentially compromising confidentiality, integrity, and availability of the affected system. The CVSS score of 7.1 reflects a high impact, but exploitation requires user interaction and a privileged network position. No known exploits in the wild have been reported.

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 confirmation, users should update to Chrome version 149.0.7827.53 or later if available. No additional mitigation recommendations are provided by the vendor advisory.