CVE-2026-58280 · GHSA-mc4q-93x5-f6hj
Microsoft Security Advisory CVE-2026-58280 - .NET and Visual Studio Denial of Service Vulnerability
- Risk score
- 73/100
- CVSS
- 7.5 v3.1
- Exploit chance (30 days)
- 1.1%
- Published
- 13 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Uncontrolled recursion in .NET allows an unauthorized attacker to deny service over a network.
- Affected
- Microsoft.NETCore.App.Runtime.linux-arm (nuget) >= 9.0.0, <= 9.0.20; Microsoft.NETCore.App.Runtime.linux-arm64 (nuget) >= 9.0.0, <= 9.0.20; Microsoft.NETCore.App.Runtime.linux-musl-arm (nuget) >= 9.0.0, <= 9.0.20; Microsoft.NETCore.App.Runtime.linux-musl-arm64 (nuget) >= 9.0.0, <= 9.0.20
- Fix
- Upgrade Microsoft.NETCore.App.Runtime.linux-arm to 9.0.21; Microsoft.NETCore.App.Runtime.linux-arm64 to 9.0.21; Microsoft.NETCore.App.Runtime.linux-musl-arm to 9.0.21; Microsoft.NETCore.App.Runtime.linux-musl-arm64 to 9.0.21; Microsoft.NETCore.App.Runtime.linux-musl-x64 to 9.0.21; Microsoft.NETCore…
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 7.5 high
- Remotely exploitable without logging in
- On your watchlist: .net, NuGet
Affected packages
| Package | Ecosystem | Vulnerable | Fixed in |
|---|---|---|---|
| Microsoft.NETCore.App.Runtime.linux-arm | nuget | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| Microsoft.NETCore.App.Runtime.linux-arm64 | nuget | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| Microsoft.NETCore.App.Runtime.linux-musl-arm | nuget | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| Microsoft.NETCore.App.Runtime.linux-musl-arm64 | nuget | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| Microsoft.NETCore.App.Runtime.linux-musl-x64 | nuget | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| Microsoft.NETCore.App.Runtime.linux-x64 | nuget | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| Microsoft.NETCore.App.Runtime.osx-arm64 | nuget | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| Microsoft.NETCore.App.Runtime.osx-x64 | nuget | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| Microsoft.NETCore.App.Runtime.win-arm | nuget | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| Microsoft.NETCore.App.Runtime.win-arm64 | nuget | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| Microsoft.NETCore.App.Runtime.win-x64 | nuget | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| Microsoft.NETCore.App.Runtime.win-x86 | nuget | >= 9.0.0, <= 9.0.20 | 9.0.21 |
References
- https://github.com/advisories/GHSA-mc4q-93x5-f6hj
- https://github.com/dotnet/runtime/security/advisories/GHSA-mc4q-93x5-f6hj
- https://github.com/dotnet/announcements/issues/447
- https://github.com/dotnet/runtime/issues/135696
- https://nvd.nist.gov/vuln/detail/CVE-2026-58280
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58280
- https://github.com/advisories/GHSA-mc4q-93x5-f6hj
Original description
Uncontrolled recursion in .NET allows an unauthorized attacker to deny service over a network.
Last activity 13 Oct 2026. Patch Forecast updates every hour.