ASP.NET Core Security Feature Bypass Vulnerability

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-70188 · Microsoft / collected KEV context

EUVD-2026-99700

GHSA-fpq8-4vhr-rcxx

cve-program · CVE-2026-70188

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70188

euvd · EUVD-2026-99700

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70188

nvd · CVE-2026-70188

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70188

osv · GHSA-fpq8-4vhr-rcxx

• https://github.com/dotnet/aspnetcore/security/advisories/GHSA-fpq8-4vhr-rcxx
• https://nvd.nist.gov/vuln/detail/CVE-2026-70188
• https://github.com/dotnet/announcements/issues/462
• https://github.com/dotnet/aspnetcore
• https://github.com/dotnet/aspnetcore/discussions/69798
• https://msrc.microsoft.com/update-guide/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. · Advisory content revised · 9 Nov 2026
• 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. · Advisory content revised · 7 Nov 2026
• 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. · Advisory content revised · 1 Nov 2026
• ASP.NET Core Security Feature Bypass Vulnerability · Published vulnerability · 13 Oct 2026