CVE-2026-70188: critical vulnerability in Microsoft ASP.NET Core 10.0
ASP.NET Core Security Feature Bypass Vulnerability
Published · Updated
25Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1
exploitation probability
—
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C
Affected products
Microsoft · ASP.NET Core 10.0Microsoft · ASP.NET Core 11.0Microsoft · ASP.NET Core 8.0Microsoft · ASP.NET Core 9.0Microsoft · Microsoft Visual Studio 2022 version 17.14Microsoft · Microsoft Visual Studio 2026 version 18.10Related CVEs — Microsoft ASP.NET Core 10.0
In the same product, most dangerous first.
CVE-2025-55315CRITICALASP.NET Security Feature Bypass VulnerabilityEPSS 65.9%CVE-2023-36038HIGHASP.NET Core Denial of Service VulnerabilityEPSS 2.8%CVE-2026-26130HIGHASP.NET Core Denial of Service VulnerabilityEPSS 2.5%CVE-2026-45591HIGHASP.NET Core Denial of Service VulnerabilityEPSS 2.4%CVE-2024-21386HIGH.NET Denial of Service VulnerabilityEPSS 2.4%CVE-2025-26682HIGHASP.NET Core and Visual Studio Denial of Service VulnerabilityEPSS 1.7%