CVE-2026-69304
Medium
Description
Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Microsoft Asp.net Core
PublishedSep 8, 2026
First seenSep 8, 2026
Weakness typeCWE-409CWE-409
How to fix
Update
- microsoft asp.net_core8.0.28, 9.0.17, 10.0.9 or later
- microsoft visual_studio_202217.14.40 or later
- microsoft visual_studio_202618.9.3 or later
- microsoft .net8.0.31, 9.0.20, 10.0.12 or later
- Microsoft.AspNetCore.Server.IISIntegration11.0.0-rc.1, 8.0.31, 9.0.20, 10.0.12 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft asp.net_core | 8.0.0 ≤ v < 8.0.28, 9.0.0 ≤ v < 9.0.17, 10.0.0 ≤ v < 10.0.9, 11.0.0 < v, 11.0 | 8.0.28, 9.0.17, 10.0.9 |
| microsoft visual_studio_2022 | 17.14.0 ≤ v < 17.14.40 | 17.14.40 |
| microsoft visual_studio_2026 | 18.9.0 ≤ v < 18.9.3 | 18.9.3 |
| microsoft .net | 8.0.0 ≤ v < 8.0.31, 9.0.0 ≤ v < 9.0.20, 10.0.0 ≤ v < 10.0.12 | 8.0.31, 9.0.20, 10.0.12 |
| Microsoft.AspNetCore.Server.IISIntegrationNuGet | 11.0.0-preview.1 ≤ v < 11.0.0-rc.1, 8.0.0 ≤ v < 8.0.31, 9.0.0 ≤ v < 9.0.20, 10.0.0 ≤ v < 10.0.12 | 11.0.0-rc.1, 8.0.31, 9.0.20, 10.0.12 |
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