# Microsoft.AspNetCore.Server.Kestrel.Core (NuGet) vulnerabilities

4 known vulnerabilities (1 critical, 1 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 2.3.13 (Sep 8, 2026): no advisory affects it
- Newest unaffected release: 2.3.13 (Sep 8, 2026), the latest release
- Releases: 29 since 2.0.0 (Aug 11, 2017)
- Registry: https://www.nuget.org/packages/Microsoft.AspNetCore.Server.Kestrel.Core
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2025-55315: 0.0.1-alpha to 2.3.0 (2.3.6 is outside it)
- CVE-2021-1723: 0.0.1-alpha to 2.1.7 (2.1.25 is outside it)
- CVE-2019-0564: 2.1.0 to 2.1.3 (2.1.7 is outside it)
- CVE-2018-0787: 2.0.0 to 2.0.1 (2.0.2 is outside it)

## Advisories (4)

### [CVE-2025-55315](https://cve.now/CVE-2025-55315): ASP.NET Security Feature Bypass Vulnerability

- Severity: Critical 9.9
- Published: Oct 14, 2025
- Affected: fixed in 2.3.6.
- Fixed in 2.3.6 (released Oct 14, 2025, the day of disclosure).
- The latest release, 2.3.13, is not affected.

### [CVE-2021-1723](https://cve.now/CVE-2021-1723): ASP.NET Core and Visual Studio Denial of Service Vulnerability

- Severity: High 7.5
- Published: Jan 12, 2021
- Affected: fixed in 2.1.25.
- Fixed in 2.1.25 (released Feb 9, 2021, 28 days after disclosure).
- The latest release, 2.3.13, is not affected.

### [CVE-2019-0564](https://cve.now/CVE-2019-0564): A denial of service vulnerability exists when ASP.NET Core improperly handles web requests, aka "ASP.NET Core Denial of Service…

- Severity: Unrated
- Published: Jan 8, 2019
- Affected: from 2.1.0, fixed in 2.1.7.
- Fixed in 2.1.7 (released Jan 8, 2019, the day of disclosure).
- The latest release, 2.3.13, is not affected.

### [CVE-2018-0787](https://cve.now/CVE-2018-0787): ASP.NET Core 1.0.

- Severity: Unrated
- Published: Mar 14, 2018
- Affected: from 2.0.0, fixed in 2.0.2.
- Fixed in 2.0.2 (released Mar 13, 2018, 1 day before disclosure).
- The latest release, 2.3.13, is not affected.

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