cve 2026 58291

The cve 2026 58291 tag covers the Microsoft Edge security advisory published on July 3, 2026. It concerns a medium-severity information disclosure flaw in Chromium-based Edge deployments running versions earlier than 150.0.4078.48. The reported issue is described as a browser memory-lifetime problem with network reach, required user interaction, and confidentiality impact. This page provides context for Windows users and administrators assessing the risk and prioritizing browser updates. The central remediation guidance is to update supported Microsoft Edge installations to version 150.0.4078.48 or later, helping reduce exposure to the vulnerability across managed and individual deployments.