This vulnerability (CWE-79) in Microsoft Edge (Chromium-based) arises from improper neutralization of input during web page generation, enabling cross-site scripting attacks. Exploitation could allow an attacker to perform spoofing attacks over a network, potentially misleading users or compromising data integrity. The CVSS 3.1 base score is 7.2 (high), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and partial impact on confidentiality and integrity. Microsoft has published an official fix for this issue.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of the affected browser, leading to spoofing attacks that may deceive users or compromise sensitive information. The impact is limited to confidentiality and integrity with no availability impact. 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 as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58298 to remediate this vulnerability.