CVE-2026-88092
Critical
Description
Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an unauthorized attacker to perform tampering over a network.
SeverityCritical
CVSS9.4
Exploit probability—
Product
Microsoft Asp.net Core
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-444CWE-444
How to fix
Update
- microsoft asp.net_core8.0.32, 9.0.21, 10.0.13 or later
- microsoft visual_studio_202217.14.42 or later
- microsoft visual_studio_202618.10.4 or later
- Microsoft.AspNetCore.App.Runtime.linux-arm8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.linux-arm648.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.linux-musl-arm8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.linux-musl-arm648.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.linux-musl-x648.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.linux-x648.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.osx-arm648.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.osx-x648.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 or later
- Microsoft.AspNetCore.App.Runtime.win-arm648.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft asp.net_core | 8.0.0 ≤ v < 8.0.32, 9.0.0 ≤ v < 9.0.21, 10.0.0 ≤ v < 10.0.13, 11.0.0 < v, 11.0 | 8.0.32, 9.0.21, 10.0.13 |
| microsoft visual_studio_2022 | 17.14.0 ≤ v < 17.14.42 | 17.14.42 |
| microsoft visual_studio_2026 | 18.10.0 ≤ v < 18.10.4 | 18.10.4 |
| Microsoft.AspNetCore.App.Runtime.linux-armNuGet | 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 9.0.0 ≤ v < 9.0.21 | 8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.linux-arm64NuGet | 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 9.0.0 ≤ v < 9.0.21 | 8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-armNuGet | 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 9.0.0 ≤ v < 9.0.21 | 8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-arm64NuGet | 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 9.0.0 ≤ v < 9.0.21 | 8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-x64NuGet | 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 9.0.0 ≤ v < 9.0.21 | 8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.linux-x64NuGet | 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 9.0.0 ≤ v < 9.0.21 | 8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.osx-arm64NuGet | 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 9.0.0 ≤ v < 9.0.21 | 8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.osx-x64NuGet | 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 9.0.0 ≤ v < 9.0.21 | 8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.win-arm64NuGet | 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 9.0.0 ≤ v < 9.0.21 | 8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.win-x64NuGet | 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 9.0.0 ≤ v < 9.0.21 | 8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 |
| Microsoft.AspNetCore.App.Runtime.win-x86NuGet | 8.0.0 ≤ v < 8.0.32, 10.0.0 ≤ v < 10.0.13, 11.0.0-preview.1 ≤ v < 11.0.0-rc.2, 9.0.0 ≤ v < 9.0.21 | 8.0.32, 10.0.13, 11.0.0-rc.2, 9.0.21 |
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