CVSS 3.1
5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LCVE-2026-120796 .NET Denial of Service Vulnerability
Medium (5.3) in microsoft. EPSS 1.2% estimated probability of exploitation activity in the next 30 days. Fixed in Microsoft.NETCore.App.Runtime.linux-arm 11.0.0.
On this page
Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.
Severity
- EPSS
- 1.2% estimated probability of exploitation activity in the next 30 days; 68th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: yes · Technical impact: partial, assessed 2026-11-11. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-407 Inefficient Algorithmic Complexity
- Published
- Modified
- Assigned by
- microsoft (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
- microsoft:.net 11.0 installed on linux
- microsoft:.net 11.0 installed on mac os
- microsoft:.net 11.0 installed on windows
- microsoft:system.text.json
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Microsoft .NET 11.0 installed on Linux | from 11.0.0-preview.1 before 11.0.0 |
| Microsoft .NET 11.0 installed on Mac OS | from 11.0.0-preview.1 before 11.0.0 |
| Microsoft .NET 11.0 installed on Windows | from 11.0.0-preview.1 before 11.0.0 |
| Microsoft System.Text.Json | from NOT_YET_AVAILABLE before 11.0.0 |
Fix and patched versions
Microsoft.NETCore.App.Runtime.linux-arm(NuGet): fixed in 11.0.0Microsoft.NETCore.App.Runtime.linux-arm64(NuGet): fixed in 11.0.0Microsoft.NETCore.App.Runtime.linux-musl-arm(NuGet): fixed in 11.0.0Microsoft.NETCore.App.Runtime.linux-musl-arm64(NuGet): fixed in 11.0.0Microsoft.NETCore.App.Runtime.linux-musl-x64(NuGet): fixed in 11.0.0Microsoft.NETCore.App.Runtime.linux-x64(NuGet): fixed in 11.0.0Microsoft.NETCore.App.Runtime.osx-arm64(NuGet): fixed in 11.0.0Microsoft.NETCore.App.Runtime.osx-x64(NuGet): fixed in 11.0.0- Ubuntu: fixed package versions per release
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-cpw3-h88j-9f6x | NuGet | Microsoft.NETCore.App.Runtime.linux-arm | >=11.0.0-preview.1.26104.118 <11.0.0 | 11.0.0 |
| GHSA-cpw3-h88j-9f6x | NuGet | Microsoft.NETCore.App.Runtime.linux-arm64 | >=11.0.0-preview.1.26104.118 <11.0.0 | 11.0.0 |
| GHSA-cpw3-h88j-9f6x | NuGet | Microsoft.NETCore.App.Runtime.linux-musl-arm | >=11.0.0-preview.1.26104.118 <11.0.0 | 11.0.0 |
| GHSA-cpw3-h88j-9f6x | NuGet | Microsoft.NETCore.App.Runtime.linux-musl-arm64 | >=11.0.0-preview.1.26104.118 <11.0.0 | 11.0.0 |
| GHSA-cpw3-h88j-9f6x | NuGet | Microsoft.NETCore.App.Runtime.linux-musl-x64 | >=11.0.0-preview.1.26104.118 <11.0.0 | 11.0.0 |
| GHSA-cpw3-h88j-9f6x | NuGet | Microsoft.NETCore.App.Runtime.linux-x64 | >=11.0.0-preview.1.26104.118 <11.0.0 | 11.0.0 |
| GHSA-cpw3-h88j-9f6x | NuGet | Microsoft.NETCore.App.Runtime.osx-arm64 | >=11.0.0-preview.1.26104.118 <11.0.0 | 11.0.0 |
| GHSA-cpw3-h88j-9f6x | NuGet | Microsoft.NETCore.App.Runtime.osx-x64 | >=11.0.0-preview.1.26104.118 <11.0.0 | 11.0.0 |
| GHSA-cpw3-h88j-9f6x | NuGet | Microsoft.NETCore.App.Runtime.win-arm64 | >=11.0.0-preview.1.26104.118 <11.0.0 | 11.0.0 |
| GHSA-cpw3-h88j-9f6x | NuGet | Microsoft.NETCore.App.Runtime.win-x64 | >=11.0.0-preview.1.26104.118 <11.0.0 | 11.0.0 |
| GHSA-cpw3-h88j-9f6x | NuGet | Microsoft.NETCore.App.Runtime.win-x86 | >=11.0.0-preview.1.26104.118 <11.0.0 | 11.0.0 |
| GHSA-cpw3-h88j-9f6x | NuGet | System.Text.Json | >=11.0.0-preview.1.26104.118 <11.0.0 | 11.0.0 |
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Ubuntu | 22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-120796 |
| Ubuntu | 22.04:LTS | dotnet8 | 8.0.134-8.0.34-0ubuntu1~22.04.1 | USN-9042-1 |
| Ubuntu | 24.04:LTS | dotnet10 | 10.0.115-10.0.15-0ubuntu1~24.04.1 | USN-9042-1 |
| Ubuntu | 24.04:LTS | dotnet8 | 8.0.134-8.0.34-0ubuntu1~24.04.1 | USN-9042-1 |
| Ubuntu | 26.04:LTS | dotnet10 | 10.0.115-10.0.15-0ubuntu1~26.04.1 | USN-9042-1 |
| Ubuntu | 26.10 | dotnet10 | 10.0.115-10.0.15-0ubuntu1~26.10.1 | USN-9042-1 |
| Ubuntu | 26.10 | dotnet11 | 11.0.100-11.0.0-0ubuntu1~26.10.1 | UBUNTU-CVE-2026-120796 USN-9042-1 |
From the distributions' data via OSV.dev: Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Ubuntu.