CVE-2025-6556: 
vulnerability analysis and mitigation

A low-severity vulnerability (CVE-2025-6556) was discovered in Google Chrome's Loader component affecting versions prior to 138.0.7204.49. The vulnerability involves insufficient policy enforcement that could allow remote attackers to bypass content security policy through crafted HTML pages. The issue was initially reported by security researcher Shaheen Fazim on January 2, 2023, and was subsequently patched in the stable channel update released on June 24, 2025 (Chrome Release, Wiz).

The vulnerability stems from inadequate validation and enforcement of security policies in Chrome's Loader component, which governs how resources are loaded and processed. It received a CVSS v3.1 base score of 5.4 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N. The vulnerability was classified as CWE-288 (Authentication Bypass Using an Alternate Path or Channel) (NVD).

The vulnerability could allow remote attackers to bypass content security policy protections through specially crafted HTML pages, potentially leading to unauthorized access to protected resources and compromise of security boundaries (Wiz).

Google has addressed this vulnerability in Chrome version 138.0.7204.49 for Windows, Mac, and Linux platforms. Users are strongly encouraged to update their browsers to this version or later. The update is being rolled out gradually over the coming days and weeks. Users can check their Chrome version and update by navigating to chrome://settings/help (Wiz).