This vulnerability (CVE-2026-11255) affects Google Chrome versions prior to 149.0.7827.53. It stems from insufficient validation of untrusted input within the Storage Access API. An attacker who has already compromised the renderer process could exploit this flaw to leak cross-origin data by crafting a malicious HTML page. The CVSS 3.1 base score is 7.5, indicating a high impact on confidentiality (C:H) with no impact on integrity or availability. The vulnerability is categorized under CWE-20 (Improper Input Validation). The vendor advisory URL is provided but does not explicitly confirm patch availability or remediation status.

The vulnerability allows a remote attacker with control over the renderer process to leak sensitive cross-origin data, compromising confidentiality. There is no impact on integrity or availability. The high CVSS score reflects the significant confidentiality risk posed by this flaw. 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. Since no explicit remediation level or patch link is provided, users and administrators should monitor the official Chrome release notes and update to the fixed version once available. No additional mitigation recommendations are provided in the advisory.