CVE-2026-70181
Microsoft Security Advisory CVE-2026-70181 - ASP.NET Core Denial of Service Vulnerability
Published Oct 13, 2026
Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.AspNetCore.WebUtilities. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. FileBufferingReadStream eagerly rents buffers during multipart processing, allowing memory exhaustion and denial of service.
Timeline
Detection, updates, and resolution for this record.
Oct 13, 2026 · GitLab Advisory Database
Detected
Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.AspNetCore.WebUtilities. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. FileBufferingReadStream eagerly rents buffers during multipart processing, allowing memory exhaustion and denial of service.
Affected
- nuget microsoft.aspnetcore.app.runtime.linux-armversion unspecified
- nuget microsoft.aspnetcore.app.runtime.linux-arm64version unspecified
- nuget microsoft.aspnetcore.app.runtime.linux-musl-armversion unspecified
- nuget microsoft.aspnetcore.app.runtime.linux-musl-arm64version unspecified
- nuget microsoft.aspnetcore.app.runtime.linux-musl-x64version unspecified
- nuget microsoft.aspnetcore.app.runtime.linux-x64version unspecified
- nuget microsoft.aspnetcore.app.runtime.osx-arm64version unspecified
- nuget microsoft.aspnetcore.app.runtime.osx-x64version unspecified
- nuget microsoft.aspnetcore.app.runtime.win-armversion unspecified
- nuget microsoft.aspnetcore.app.runtime.win-arm64version unspecified
- nuget microsoft.aspnetcore.app.runtime.win-x64version unspecified
- nuget microsoft.aspnetcore.app.runtime.win-x86version unspecified
Sources
- CVE.orgCVE-2026-70181
Official CVE identifier
cve.org - FIRST EPSSCVE-2026-70181
30-day exploitation probability 1.1%
first.org - GitLab Advisory DatabaseCVE-2026-70181
Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.AspNetCore.WebUtilities. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. FileBufferingReadStream eagerly rents buffers during multipart processing, allowing memory exhaustion and denial of service.
advisories.gitlab.com