CVE-2026-114154: Microsoft Security Advisory CVE-2026-114154 - ASP.NET Core Denial of Service Vulnerability
Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core. This advisory provides guidance on updating affected applications and components.
Malformed chunked HttpSys requests containing conflicting content-length headers can retain request and connection resources.
References
- github.com/advisories/GHSA-3893-7fxc-qvff
- github.com/dotnet/announcements/issues/513
- github.com/dotnet/aspnetcore/commit/20e629e9af9cabb0c1c02410be99521821b22f83
- github.com/dotnet/aspnetcore/commit/8cb8dc4a1d3e5a6aedeb3dbbfd0b390aac59f172
- github.com/dotnet/aspnetcore/commit/efc799e69e38cdc36c7b9c96580014d28e68201c
- github.com/dotnet/aspnetcore/discussions/70474
- github.com/dotnet/aspnetcore/releases/tag/v10.0.15
- github.com/dotnet/aspnetcore/releases/tag/v8.0.34
- github.com/dotnet/aspnetcore/releases/tag/v9.0.23
- github.com/dotnet/aspnetcore/security/advisories/GHSA-3893-7fxc-qvff
- github.com/dotnet/core/blob/main/release-notes/10.0/10.0.15/10.0.15.md
- github.com/dotnet/core/blob/main/release-notes/8.0/8.0.34/8.0.34.md
- github.com/dotnet/core/blob/main/release-notes/9.0/9.0.23/9.0.23.md
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-114154
- nvd.nist.gov/vuln/detail/CVE-2026-114154
- nvd.nist.gov/vuln/detail/cve-2026-114154
Code Behaviors & Features
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