Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
CVE-2026-96196
Summary
Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Products covered
ASP.NET Core 11.0
.NET 10.0 runtime installed on Windows
.NET 9.0 runtime installed on Windows
.NET 8.0 runtime installed on Windows
Microsoft Visual Studio 2026 version 18.9
Microsoft Visual Studio 2022 version 17.14
ASP.NET Core 9.0
ASP.NET Core 10.0
Show 1 more products
ASP.NET Core 8.0
Remediation
Release Notes Install KB5126106. Install KB5126105. Install KB5126104.
Vendor-listed fixes
11.0 RC1
10.0.12
9.0.20
8.0.31
18.9.3
17.14.40
CVEs in this advisory 1
Update history
What changed in later vendor updates
SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.
- Added affected products: .NET 8.0 runtime installed on Windows, .NET 9.0 runtime installed on Windows, .NET 10.0 runtime installed on Windows.
- Removed affected products: .NET 8.0 installed on Windows, .NET 9.0 installed on Windows, .NET 10.0 installed on Windows.
- The vendor changed the advisory's last-updated date.
Updates
- Published by Microsoft Security Response Center
The publication date reported by the vendor.
- Added to SecurityAlert
We collected the advisory from the official source.
- Updated by Microsoft Security Response Center
The vendor changed the advisory after it was first published.
- Confirmed at the source
Our collector saw this advisory during a later source check.