Microsoft disclosed CVE-2026-57989, a high-severity origin validation error in Chromium-based Edge that lets an unauthorized attacker disclose information over a network. The flaw is rated CVSS 7.4 and affects versions before 150.0.4078.99.

An unauthorized attacker could exploit the flaw to disclose information.
This indicates network attack vector, low attack complexity, no privileges required, user interaction required, changed scope, high confidentiality impact, and no integrity or availability impact.
Enterprise security teams should prioritize patching Edge to the 150.0.4078.99 release to mitigate the high confidentiality risk from this network-reachable flaw.
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