Missing Release of Memory after Effective Lifetime Affecting microsoft.aspnetcore.server.httpsys package, versions [2.3.10,2.3.14)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-DOTNET-MICROSOFTASPNETCORESERVERHTTPSYS-22421812
- published11 Nov 2026
- disclosed9 Nov 2026
- creditKevin Gosse
Introduced: 9 Nov 2026
NewCVE-2026-114154 (opens in a new tab)How to fix?
Upgrade Microsoft.AspNetCore.Server.HttpSys to version 2.3.14 or higher.
Overview
Microsoft.AspNetCore.Server.HttpSys is an ASP.NET Core HTTP server that uses the Windows HTTP Server API.
Affected versions of this package are vulnerable to Missing Release of Memory after Effective Lifetime when parsing malformed chunked requests that contain conflicting content-length headers, which retains request and connection resources. An attacker can exhaust server resources by sending such requests repeatedly. Exposure is limited to applications hosted on the HttpSys server on Windows.