This vulnerability, identified as CWE-79, affects Microsoft Edge (Chromium-based) version 1.0.0.0. It is a cross-site scripting (XSS) flaw caused by improper neutralization of input during web page generation, potentially enabling spoofing attacks. The CVSS v3.1 base score is 5.4, indicating medium severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality and integrity. Microsoft has published an official fix for this vulnerability.

Exploitation of this vulnerability could allow an attacker to execute malicious scripts in the context of the affected browser, potentially leading to spoofing attacks that impact confidentiality and integrity of user data. However, no known exploits are reported in the wild at this time.

An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45494 for the official patch and update instructions.