Vulnerability Intelligence Report
ASP.NET Core Security Feature Bypass Vulnerability
CVE-2026-70188
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.
No Active Exploit Signals
CVSS Base Score
9.1
CRITICAL
Exploitability:3.9
Impact Score:5.2
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-444 ↗CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | ASP.NET Core 10.0 | 10.0 < 10.0.13 (affected) |
| Microsoft | ASP.NET Core 11.0 | 11.0 < 11.0.0-rc.2 (affected) |
| Microsoft | ASP.NET Core 8.0 | 8.0 < 8.0.32 (affected) |
| Microsoft | ASP.NET Core 9.0 | 9.0 < 9.0.21 (affected) |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 < 17.14.42 (affected) |
| Microsoft | Microsoft Visual Studio 2026 version 18.10 | 18.10.0 < 18.10.4 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2026-08-03T23:48:30 |
| Published | 2026-10-13T19:00:26 |
| Patch Date | 2026-10-13 |
| Last Updated | 2026-10-13T22:19:04 |
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