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Advisory record · GHSA-j8gr-8fp3-5q5h

Microsoft Security Advisory CVE-2026-56170 – .NET Denial of Service Vulnerability

CVSS 7.5 HighEPSS 0.012 · 67th percentile

Published by the GitHub Advisory Database at 21 Jul 2026, 16:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
Microsoft.AspNetCore.App.Runtime.linux-armNuGet>=10.0.0, <10.0.6 || >=9.0.0, <9.0.15 || >=8.0.0, <8.0.2610.0.6, 9.0.15, 8.0.26
Microsoft.AspNetCore.App.Runtime.linux-arm64NuGet>=10.0.0, <10.0.6 || >=9.0.0, <9.0.15 || >=8.0.0, <8.0.2610.0.6, 9.0.15, 8.0.26
Microsoft.AspNetCore.App.Runtime.linux-musl-armNuGet>=10.0.0, <10.0.6 || >=9.0.0, <9.0.15 || >=8.0.0, <8.0.2610.0.6, 9.0.15, 8.0.26
Microsoft.AspNetCore.App.Runtime.linux-musl-arm64NuGet>=10.0.0, <10.0.6 || >=9.0.0, <9.0.15 || >=8.0.0, <8.0.2610.0.6, 9.0.15, 8.0.26
Microsoft.AspNetCore.App.Runtime.linux-musl-x64NuGet>=10.0.0, <10.0.6 || >=9.0.0, <9.0.15 || >=8.0.0, <8.0.2610.0.6, 9.0.15, 8.0.26
Microsoft.AspNetCore.App.Runtime.linux-x64NuGet>=10.0.0, <10.0.6 || >=9.0.0, <9.0.15 || >=8.0.0, <8.0.2610.0.6, 9.0.15, 8.0.26
Microsoft.AspNetCore.App.Runtime.osx-arm64NuGet>=10.0.0, <10.0.6 || >=9.0.0, <9.0.15 || >=8.0.0, <8.0.2610.0.6, 9.0.15, 8.0.26
Microsoft.AspNetCore.App.Runtime.osx-x64NuGet>=10.0.0, <10.0.6 || >=9.0.0, <9.0.15 || >=8.0.0, <8.0.2610.0.6, 9.0.15, 8.0.26
Microsoft.AspNetCore.App.Runtime.win-armNuGet>=10.0.0, <10.0.6 || >=9.0.0, <9.0.15 || >=8.0.0, <8.0.2610.0.6, 9.0.15, 8.0.26
Microsoft.AspNetCore.App.Runtime.win-arm64NuGet>=10.0.0, <10.0.6 || >=9.0.0, <9.0.15 || >=8.0.0, <8.0.2610.0.6, 9.0.15, 8.0.26
Microsoft.AspNetCore.App.Runtime.win-x64NuGet>=10.0.0, <10.0.6 || >=9.0.0, <9.0.15 || >=8.0.0, <8.0.2610.0.6, 9.0.15, 8.0.26
Microsoft.AspNetCore.App.Runtime.win-x86NuGet>=10.0.0, <10.0.6 || >=9.0.0, <9.0.15 || >=8.0.0, <8.0.2610.0.6, 9.0.15, 8.0.26
Identifiers
GHSA-j8gr-8fp3-5q5h · BIT-dotnet-2026-56170 · BIT-dotnet-sdk-2026-56170 · CVE-2026-56170
Weakness (CWE)
CWE-770
Tags
Published
21 Jul 2026
Updated
27 Jul 2026

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C CNA (microsoft)
  • CISA KEV Not listed.
  • EPSS 0.012, the 67th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 14 Jul 2026, 17:05 UTC Confirmed by the CVE List
  2. 31 Oct 2026, 15:22 UTC First seen by agentprime
  3. 31 Oct 2026, 15:22 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.