CVE-2026-70188
Critical
Description
Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an unauthorized attacker to bypass a security feature over a network.
SeverityCritical
CVSS9.1
Exploit probability—
ProductMicrosoft.aspnetcore.app.runtime.linux-arm
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-444CWE-444
How to fix
Update
- Microsoft.AspNetCore.App.Runtime.linux-arm11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.linux-arm6411.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.linux-musl-arm11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.linux-musl-arm6411.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.linux-musl-x6411.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.linux-x6411.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.osx-arm6411.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.osx-x6411.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.win-arm6411.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.win-x6411.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.win-x8611.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft.AspNetCore.App.Runtime.linux-armNuGet | 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 9.0.0 ≤ v < 9.0.21 | 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.linux-arm64NuGet | 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 9.0.0 ≤ v < 9.0.21 | 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-armNuGet | 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 9.0.0 ≤ v < 9.0.21 | 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-arm64NuGet | 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 9.0.0 ≤ v < 9.0.21 | 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-x64NuGet | 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 9.0.0 ≤ v < 9.0.21 | 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.linux-x64NuGet | 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 9.0.0 ≤ v < 9.0.21 | 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.osx-arm64NuGet | 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 9.0.0 ≤ v < 9.0.21 | 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.osx-x64NuGet | 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 9.0.0 ≤ v < 9.0.21 | 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.win-arm64NuGet | 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 9.0.0 ≤ v < 9.0.21 | 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.win-x64NuGet | 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 9.0.0 ≤ v < 9.0.21 | 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.win-x86NuGet | 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 9.0.0 ≤ v < 9.0.21 | 11.0.0-rc.2, 8.0.32, 10.0.13, 9.0.21 |
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