CVE-2026-66318
High
Description
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
SeverityHigh
CVSS8.1
Exploit probability—
Product
Microsoft Edge Chromium
PublishedAug 4, 2026
First seenAug 4, 2026
Weakness typeCWE-346CWE-346
How to fix
Update
- microsoft edge_chromium151.0.4129.59 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft edge_chromium | v < 151.0.4129.59 | 151.0.4129.59 |
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