CVE-2026-11014 is a vulnerability in Google Chrome's extension policy enforcement mechanism affecting versions before 149.0.7827.53. The insufficient enforcement allows a maliciously crafted Chrome extension, installed by a user, to bypass site isolation, a security feature designed to separate web content processes. This vulnerability is identified as CWE-602 (Insufficient Control of Functionality). The CVSS 3.1 base score is 6.5, reflecting a network attack vector with low attack complexity, no privileges required, but requiring user interaction, and resulting in high integrity impact without confidentiality or availability impact. No known exploits are reported in the wild. The vendor advisory link points to a Chrome stable channel update blog, but no explicit patch or remediation level is stated in the provided data.

An attacker who convinces a user to install a malicious extension can bypass Chrome's site isolation security feature, potentially allowing the extension to interfere with or manipulate content across site boundaries. This compromises the integrity of the browser environment but does not affect confidentiality or availability according to the CVSS vector. The vulnerability requires user interaction (installing the malicious extension) and has a medium severity rating.

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. Users should avoid installing untrusted or suspicious extensions until an official fix is confirmed. Follow updates from Google Chrome for any released patches addressing this issue.