CVE-2026-11142 is a medium severity vulnerability in Google Chrome's Paint component affecting versions before 149.0.7827.53. It involves insufficient enforcement of the same origin policy, allowing a remote attacker to bypass this security control via a crafted HTML page. The vulnerability is identified as CWE-639 (Authorization Bypass Through User-Controlled Key). The CVSS 3.1 vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality impact, high integrity impact, and no availability impact. The vendor advisory URL is provided but does not explicitly confirm patch availability or remediation level.

The vulnerability allows a remote attacker to bypass the same origin policy, potentially enabling unauthorized modification of data or actions within the browser context (integrity impact). There is no reported impact on confidentiality or availability. No known exploits have been observed in the wild, reducing immediate risk.

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 official confirmation, users should update to the latest Chrome version once available. No specific temporary mitigations are provided in the available data.