Nov 2026: ASP.NET Core Denial of Service Vulnerability
CVE-2026-118749 Published on November 10, 2026

ASP.NET Core Denial of Service Vulnerability
Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Vendor Advisory NVD

Vulnerability Analysis

Exploitation:

NONE

Automatable:

YES

Technical Impact:

PARTIAL

Weakness Type

Inefficient Algorithmic Complexity

An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.

Products Associated with CVE-2026-118749

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Microsoft Extensions Validation

Microsoft Net 11 0 Installed On Windows

Microsoft Net 11 0 Installed On Linux

Microsoft Net 11 0 Installed On Mac Os

Microsoft Visual Studio 2026 Version 18 12

Affected Versions

Microsoft .NET 11.0 installed on Linux:

Version 11.0.0-preview.1 and below 11.0.0 is affected.

Microsoft .NET 11.0 installed on Mac OS:

Version 11.0.0-preview.1 and below 11.0.0 is affected.

Microsoft .NET 11.0 installed on Windows:

Version 11.0.0-preview.1 and below 11.0.0 is affected.

Microsoft Visual Studio 2026 version 18.12:

Version 18.12.0 and below 18.12.0 is affected.

Microsoft.Extensions.Validation:

Version 11.0.0-rc.1.26425.128 and below 11.0.0 is affected.

Exploit Probability

EPSS

1.08%

Percentile

65.41%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.