Vulnerability Intelligence Report
ASP.NET Core Denial of Service Vulnerability
CVE-2026-69304
Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
No Active Exploit Signals
CVSS Base Score
5.9
MEDIUM
Exploitability:2.3
Impact Score:3.6
EPSS Probability:0.88%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-409 ↗CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | .NET 10.0 | 10.0.0 < 10.0.12 (affected) |
| Microsoft | .NET 8.0 | 8.0.0 < 8.0.31 (affected) |
| Microsoft | .NET 9.0 | 9.0.0 < 9.0.20 (affected) |
| Microsoft | ASP.NET Core 10.0 | 10.0 < 10.0.12 (affected) |
| Microsoft | ASP.NET Core 11.0 | 11.0 < 11.0 RC1 (affected) |
| Microsoft | ASP.NET Core 8.0 | 8.0 < 8.0.31 (affected) |
| Microsoft | ASP.NET Core 9.0 | 9.0 < 9.0.20 (affected) |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 < 17.14.40 (affected) |
| Microsoft | Microsoft Visual Studio 2026 version 18.9 | 18.9.0 < 18.9.3 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.876%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2026-08-03T20:46:07 |
| Published | 2026-09-08T17:17:47 |
| Patch Date | 2026-09-08 |
| Last Updated | 2026-10-08T18:18:57 |
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