Executive brief
Microsoft Edge is a web browser used by millions of people to browse the internet and access online services. An attacker can exploit an origin validation error to spoof web content or impersonate legitimate websites, potentially tricking users into providing sensitive information or downloading malicious content.
Technical details
The vulnerability is an origin validation error in the Chromium-based Microsoft Edge browser. The flaw allows an unauthenticated attacker on the network to conduct spoofing attacks by bypassing security checks that verify the origin of web content. This could enable man-in-the-middle or network-based attacks where an attacker tricks a user's browser into displaying forged content from an attacker-controlled source as if it came from a legitimate origin. No patch information is provided in the advisory.
Affected products
- Microsoft Edge <UNKNOWN>
Timeline
- 2026-08-04: disclosed