CVE-2026-69651: .NET Denial of Service Vulnerability

Published Oct 13, 2026
·
Updated

.NET Denial of Service Vulnerability

Other sources

Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Xml; System.Private.Xml. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

Signed XML fixes add input-depth and operation-count limits, prohibit DTD processing by default, validate entity references, bound encrypted-data candidate processing, and cap attributes and namespaces used by C14N transforms.

Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/449

CVSS Details

- Version: 3.1 - Severity: High - Score: 7.5 - Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

- Weakness: CWE-407 (Inefficient Algorithmic Complexity) Affected Platforms

- Platforms: Windows, Linux, macOS - Architectures: All

<a name="affected-packages"></a>Affected Packages

The vulnerability affects Microsoft .NET projects that use an affected package version listed below.

Package name | Affected version | Patched version ------------ | ---------------- | --------------- Microsoft.NETCore.App.Runtime.linux-arm | >= 9.0.0, <= 9.0.20 | 9.0.21 Microsoft.NETCore.App.Runtime.linux-arm64 | >= 9.0.0, <= 9.0.20 | 9.0.21 Microsoft.NETCore.App.Runtime.linux-musl-arm | >= 9.0.0, <= 9.0.20 | 9.0.21 Microsoft.NETCore.App.Runtime.linux-musl-arm64 | >= 9.0.0, <= 9.0.20 | 9.0.21 Microsoft.NETCore.App.Runtime.linux-musl-x64 | >= 9.0.0, <= 9.0.20 | 9.0.21 Microsoft.NETCore.App.Runtime.linux-x64 | >= 9.0.0, <= 9.0.20 | 9.0.21 Microsoft.NETCore.App.Runtime.osx-arm64 | >= 9.0.0, <= 9.0.20 | 9.0.21 Microsoft.NETCore.App.Runtime.osx-x64 | >= 9.0.0, <= 9.0.20 | 9.0.21 Microsoft.NETCore.App.Runtime.win-arm | >= 9.0.0, <= 9.0.20 | 9.0.21 Microsoft.NETCore.App.Runtime.win-arm64 | >= 9.0.0, <= 9.0.20 | 9.0.21 Microsoft.NETCore.App.Runtime.win-x64 | >= 9.0.0, <= 9.0.20 | 9.0.21 Microsoft.NETCore.App.Runtime.win-x86 | >= 9.0.0, <= 9.0.20 | 9.0.21 Microsoft.NETCore.App.Runtime.linux-arm | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 Microsoft.NETCore.App.Runtime.linux-arm64 | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 Microsoft.NETCore.App.Runtime.linux-musl-arm | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 Microsoft.NETCore.App.Runtime.linux-musl-arm64 | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 Microsoft.NETCore.App.Runtime.linux-musl-x64 | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 Microsoft.NETCore.App.Runtime.linux-x64 | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 Microsoft.NETCore.App.Runtime.osx-arm64 | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 Microsoft.NETCore.App.Runtime.osx-x64 | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 Microsoft.NETCore.App.Runtime.win-arm | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 Microsoft.NETCore.App.Runtime.win-arm64 | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 Microsoft.NETCore.App.Runtime.win-x64 | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 Microsoft.NETCore.App.Runtime.win-x86 | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 Microsoft.NETCore.App.Runtime.linux-arm | >= 10.0.0, <= 10.0.12 | 10.0.13 Microsoft.NETCore.App.Runtime.linux-arm64 | >= 10.0.0, <= 10.0.12 | 10.0.13 Microsoft.NETCore.App.Runtime.linux-musl-arm | >= 10.0.0, <= 10.0.12 | 10.0.13 Microsoft.NETCore.App.Runtime.linux-musl-arm64 | >= 10.0.0, <= 10.0.12 | 10.0.13 Microsoft.NETCore.App.Runtime.linux-musl-x64 | >= 10.0.0, <= 10.0.12 | 10.0.13 Microsoft.NETCore.App.Runtime.linux-x64 | >= 10.0.0, <= 10.0.12 | 10.0.13 Microsoft.NETCore.App.Runtime.osx-arm64 | >= 10.0.0, <= 10.0.12 | 10.0.13 Microsoft.NETCore.App.Runtime.osx-x64 | >= 10.0.0, <= 10.0.12 | 10.0.13 Microsoft.NETCore.App.Runtime.win-arm | >= 10.0.0, <= 10.0.12 | 10.0.13 Microsoft.NETCore.App.Runtime.win-arm64 | >= 10.0.0, <= 10.0.12 | 10.0.13 Microsoft.NETCore.App.Runtime.win-x64 | >= 10.0.0, <= 10.0.12 | 10.0.13 Microsoft.NETCore.App.Runtime.win-x86 | >= 10.0.0, <= 10.0.12 | 10.0.13 Microsoft.NETCore.App.Runtime.linux-arm | >= 8.0.0, <= 8.0.31 | 8.0.32 Microsoft.NETCore.App.Runtime.linux-arm64 | >= 8.0.0, <= 8.0.31 | 8.0.32 Microsoft.NETCore.App.Runtime.linux-musl-arm | >= 8.0.0, <= 8.0.31 | 8.0.32 Microsoft.NETCore.App.Runtime.linux-musl-arm64 | >= 8.0.0, <= 8.0.31 | 8.0.32 Microsoft.NETCore.App.Runtime.linux-musl-x64 | >= 8.0.0, <= 8.0.31 | 8.0.32 Microsoft.NETCore.App.Runtime.linux-x64 | >= 8.0.0, <= 8.0.31 | 8.0.32 Microsoft.NETCore.App.Runtime.osx-arm64 | >= 8.0.0, <= 8.0.31 | 8.0.32 Microsoft.NETCore.App.Runtime.osx-x64 | >= 8.0.0, <= 8.0.31 | 8.0.32 Microsoft.NETCore.App.Runtime.win-arm | >= 8.0.0, <= 8.0.31 | 8.0.32 Microsoft.NETCore.App.Runtime.win-arm64 | >= 8.0.0, <= 8.0.31 | 8.0.32 Microsoft.NETCore.App.Runtime.win-x64 | >= 8.0.0, <= 8.0.31 | 8.0.32 Microsoft.NETCore.App.Runtime.win-x86 | >= 8.0.0, <= 8.0.31 | 8.0.32

Advisory FAQ

<a name="how-affected"></a>How do I know if I am affected?

If using a package listed in affected packages, you're exposed to the vulnerability.

<a name="how-fix"></a>How do I fix the issue?

1. To fix the issue please install the latest version of .NET. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs. 2. If your application references the vulnerable package, update the package reference to the patched version. You can list the versions you have installed by running the dotnet --info command.

Once you have installed the updated runtime or SDK, restart your apps for the update to take effect.

Additionally, if you've deployed self-contained applications targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.

Other Information

Reporting Security Issues

If you have found a potential security issue in a supported version of .NET, please report it to the Microsoft Security Response Center (MSRC) via the MSRC Researcher Portal. Further information can be found in the MSRC Report an Issue FAQ.

Security reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.

Support

You can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.

Disclaimer

The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

External Links

CVE-2026-69651

Acknowledgements

- l8BL with ENKI WhiteHat (https://enki.co.kr/) - Leandro Batista - Kevin Schmidt - Dr.-Ing Ashar Javed (@soaj1664ashar)

Revisions

V1.0 (10/13/2026): Advisory published.

— GitHub

Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.

— Microsoft

Affected Software

77 affected componentsFixes available
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
Microsoft .NET Framework=3.5, =4.6.2, =4.7, =4.7.1, =4.7.2
2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0
Microsoft .NET 9.0 installed on Windows<9.0.21
9.0.21
Microsoft .NET 8.0 installed on Windows<8.0.32
8.0.32
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
Microsoft Visual Studio 2026=18.10
18.10.4
Microsoft .NET Framework=3.5, =4.6.2, =4.7, =4.7.1, =4.7.2
2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.10008.0
Microsoft .NET Framework=3.5, =4.7.2
2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0
Microsoft .NET 11.0 installed on Mac OS<11.0.0-rc.2
11.0.0-rc.2
Microsoft .NET Framework=4.8.1
4.8.9363.0
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
Microsoft .NET 8.0 installed on Linux<8.0.32
8.0.32
Microsoft .NET 10.0 installed on Mac OS<10.0.13
10.0.13
Microsoft .NET 10.0 installed on Windows<10.0.13
10.0.13
Microsoft .NET 8.0 installed on Mac OS<8.0.32
8.0.32
Microsoft .NET 11.0 installed on Windows<11.0.0-rc.2
11.0.0-rc.2
Microsoft .NET 9.0 installed on Mac OS<9.0.21
9.0.21
Microsoft .NET Framework=4.8
4.8.4811.0
Microsoft .NET 9.0 installed on Linux<9.0.21
9.0.21
Microsoft Visual Studio 2022=17.14
17.14.42
Microsoft .NET 11.0 installed on Linux<11.0.0-rc.2
11.0.0-rc.2
Microsoft .NET 10.0 installed on Linux<10.0.13
10.0.13
Microsoft .NET Framework=4.8
4.8.4811.0
Microsoft .NET Framework=3.5, =4.8
2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0
Microsoft .NET Framework=4.8
4.8.4811.0
Microsoft .NET Framework=3.5
2.0.50727.8987 AND 3.0.30729.8982
Microsoft .NET Framework=4.6.2, =4.7, =4.7.1, =4.7.2
4.7.4150.0
Microsoft .NET Framework=3.5, =4.8
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0
Microsoft .NET Framework=4.6.2, =4.7, =4.7.1, =4.7.2
4.7.4150.0
Microsoft .NET Framework=3.5, =4.8
2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0
Microsoft .NET Framework=3.5
2.0.50727.8987 AND 3.0.30729.8982
Microsoft .NET Framework=3.5
2.0.50727.9188 AND 3.0.30729.9171
nuget/Microsoft.NETCore.App.Runtime.win-x86>=8.0.0<=8.0.31
8.0.32
nuget/Microsoft.NETCore.App.Runtime.win-x64>=8.0.0<=8.0.31
8.0.32
nuget/Microsoft.NETCore.App.Runtime.win-arm64>=8.0.0<=8.0.31
8.0.32
nuget/Microsoft.NETCore.App.Runtime.osx-x64>=8.0.0<=8.0.31
8.0.32
nuget/Microsoft.NETCore.App.Runtime.osx-arm64>=8.0.0<=8.0.31
8.0.32
nuget/Microsoft.NETCore.App.Runtime.linux-x64>=8.0.0<=8.0.31
8.0.32
nuget/Microsoft.NETCore.App.Runtime.linux-musl-x64>=8.0.0<=8.0.31
8.0.32
nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm64>=8.0.0<=8.0.31
8.0.32
nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm>=8.0.0<=8.0.31
8.0.32
nuget/Microsoft.NETCore.App.Runtime.linux-arm64>=8.0.0<=8.0.31
8.0.32
nuget/Microsoft.NETCore.App.Runtime.linux-arm>=8.0.0<=8.0.31
8.0.32
nuget/Microsoft.NETCore.App.Runtime.win-x86>=10.0.0<=10.0.12
10.0.13
nuget/Microsoft.NETCore.App.Runtime.win-x64>=10.0.0<=10.0.12
10.0.13
nuget/Microsoft.NETCore.App.Runtime.win-arm64>=10.0.0<=10.0.12
10.0.13
nuget/Microsoft.NETCore.App.Runtime.osx-x64>=10.0.0<=10.0.12
10.0.13
nuget/Microsoft.NETCore.App.Runtime.osx-arm64>=10.0.0<=10.0.12
10.0.13
nuget/Microsoft.NETCore.App.Runtime.linux-x64>=10.0.0<=10.0.12
10.0.13
nuget/Microsoft.NETCore.App.Runtime.linux-musl-x64>=10.0.0<=10.0.12
10.0.13
nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm64>=10.0.0<=10.0.12
10.0.13
nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm>=10.0.0<=10.0.12
10.0.13
nuget/Microsoft.NETCore.App.Runtime.linux-arm64>=10.0.0<=10.0.12
10.0.13
nuget/Microsoft.NETCore.App.Runtime.linux-arm>=10.0.0<=10.0.12
10.0.13
nuget/Microsoft.NETCore.App.Runtime.win-x86>=11.0.0-preview.1<=11.0.0-rc.1
11.0.0-rc.2
nuget/Microsoft.NETCore.App.Runtime.win-x64>=11.0.0-preview.1<=11.0.0-rc.1
11.0.0-rc.2
nuget/Microsoft.NETCore.App.Runtime.win-arm64>=11.0.0-preview.1<=11.0.0-rc.1
11.0.0-rc.2
nuget/Microsoft.NETCore.App.Runtime.osx-x64>=11.0.0-preview.1<=11.0.0-rc.1
11.0.0-rc.2
nuget/Microsoft.NETCore.App.Runtime.osx-arm64>=11.0.0-preview.1<=11.0.0-rc.1
11.0.0-rc.2
nuget/Microsoft.NETCore.App.Runtime.linux-x64>=11.0.0-preview.1<=11.0.0-rc.1
11.0.0-rc.2
nuget/Microsoft.NETCore.App.Runtime.linux-musl-x64>=11.0.0-preview.1<=11.0.0-rc.1
11.0.0-rc.2
nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm64>=11.0.0-preview.1<=11.0.0-rc.1
11.0.0-rc.2
nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm>=11.0.0-preview.1<=11.0.0-rc.1
11.0.0-rc.2
nuget/Microsoft.NETCore.App.Runtime.linux-arm64>=11.0.0-preview.1<=11.0.0-rc.1
11.0.0-rc.2
nuget/Microsoft.NETCore.App.Runtime.linux-arm>=11.0.0-preview.1<=11.0.0-rc.1
11.0.0-rc.2
nuget/Microsoft.NETCore.App.Runtime.win-x86>=9.0.0<=9.0.20
9.0.21
nuget/Microsoft.NETCore.App.Runtime.win-x64>=9.0.0<=9.0.20
9.0.21
nuget/Microsoft.NETCore.App.Runtime.win-arm64>=9.0.0<=9.0.20
9.0.21
nuget/Microsoft.NETCore.App.Runtime.osx-x64>=9.0.0<=9.0.20
9.0.21
nuget/Microsoft.NETCore.App.Runtime.osx-arm64>=9.0.0<=9.0.20
9.0.21
nuget/Microsoft.NETCore.App.Runtime.linux-x64>=9.0.0<=9.0.20
9.0.21
nuget/Microsoft.NETCore.App.Runtime.linux-musl-x64>=9.0.0<=9.0.20
9.0.21
nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm64>=9.0.0<=9.0.20
9.0.21
nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm>=9.0.0<=9.0.20
9.0.21
nuget/Microsoft.NETCore.App.Runtime.linux-arm64>=9.0.0<=9.0.20
9.0.21
nuget/Microsoft.NETCore.App.Runtime.linux-arm>=9.0.0<=9.0.20
9.0.21

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0Patch KB5127689
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0Patch KB5127666
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0Patch KB5127692
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 9.0.21Patch KB5130035
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 8.0.32Patch KB5130034
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0Patch KB5126868
  7. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 18.10.4
  8. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.10008.0Patch KB5127694
  9. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  10. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 4.8.9363.0Patch KB5127691
  11. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0Patch KB5127690
  12. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0Patch KB5127693
  13. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.13Patch KB5130036
  14. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 4.8.4811.0Patch KB5127684
  15. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 17.14.42
  16. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 4.8.4811.0Patch KB5127688
  17. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0Patch KB5127685
  18. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 4.8.4811.0Patch KB5127686
  19. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.8987 AND 3.0.30729.8982Patch KB5127660
  20. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0Patch KB5127687
  21. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 4.7.4150.0Patch KB5127668
  22. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 4.7.4150.0Patch KB5127667
  23. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0Patch KB5127683
  24. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.8987 AND 3.0.30729.8982Patch KB5127664
  25. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 2.0.50727.9188 AND 3.0.30729.9171Patch KB5127696
  26. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.win-x86 to a version that resolves this vulnerability.

    Fixed in 8.0.32
  27. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.win-x64 to a version that resolves this vulnerability.

    Fixed in 8.0.32
  28. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.win-arm64 to a version that resolves this vulnerability.

    Fixed in 8.0.32
  29. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.osx-x64 to a version that resolves this vulnerability.

    Fixed in 8.0.32
  30. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.osx-arm64 to a version that resolves this vulnerability.

    Fixed in 8.0.32
  31. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-x64 to a version that resolves this vulnerability.

    Fixed in 8.0.32
  32. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-musl-x64 to a version that resolves this vulnerability.

    Fixed in 8.0.32
  33. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm64 to a version that resolves this vulnerability.

    Fixed in 8.0.32
  34. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm to a version that resolves this vulnerability.

    Fixed in 8.0.32
  35. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-arm64 to a version that resolves this vulnerability.

    Fixed in 8.0.32
  36. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-arm to a version that resolves this vulnerability.

    Fixed in 8.0.32
  37. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.win-x86 to a version that resolves this vulnerability.

    Fixed in 10.0.13
  38. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.win-x64 to a version that resolves this vulnerability.

    Fixed in 10.0.13
  39. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.win-arm64 to a version that resolves this vulnerability.

    Fixed in 10.0.13
  40. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.osx-x64 to a version that resolves this vulnerability.

    Fixed in 10.0.13
  41. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.osx-arm64 to a version that resolves this vulnerability.

    Fixed in 10.0.13
  42. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-x64 to a version that resolves this vulnerability.

    Fixed in 10.0.13
  43. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-musl-x64 to a version that resolves this vulnerability.

    Fixed in 10.0.13
  44. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm64 to a version that resolves this vulnerability.

    Fixed in 10.0.13
  45. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm to a version that resolves this vulnerability.

    Fixed in 10.0.13
  46. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-arm64 to a version that resolves this vulnerability.

    Fixed in 10.0.13
  47. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-arm to a version that resolves this vulnerability.

    Fixed in 10.0.13
  48. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.win-x86 to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  49. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.win-x64 to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  50. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.win-arm64 to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  51. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.osx-x64 to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  52. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.osx-arm64 to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  53. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-x64 to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  54. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-musl-x64 to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  55. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm64 to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  56. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  57. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-arm64 to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  58. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-arm to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  59. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.win-x86 to a version that resolves this vulnerability.

    Fixed in 9.0.21
  60. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.win-x64 to a version that resolves this vulnerability.

    Fixed in 9.0.21
  61. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.win-arm64 to a version that resolves this vulnerability.

    Fixed in 9.0.21
  62. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.osx-x64 to a version that resolves this vulnerability.

    Fixed in 9.0.21
  63. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.osx-arm64 to a version that resolves this vulnerability.

    Fixed in 9.0.21
  64. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-x64 to a version that resolves this vulnerability.

    Fixed in 9.0.21
  65. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-musl-x64 to a version that resolves this vulnerability.

    Fixed in 9.0.21
  66. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm64 to a version that resolves this vulnerability.

    Fixed in 9.0.21
  67. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm to a version that resolves this vulnerability.

    Fixed in 9.0.21
  68. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-arm64 to a version that resolves this vulnerability.

    Fixed in 9.0.21
  69. Upgrade

    Upgrade nuget/Microsoft.NETCore.App.Runtime.linux-arm to a version that resolves this vulnerability.

    Fixed in 9.0.21
  70. Upgrade

    Upgrade Microsoft.NETCore.App.Runtime.* to a version that resolves this vulnerability.

    Fixed in 8.0.32
  71. Upgrade

    Upgrade Microsoft.NETCore.App.Runtime.* to a version that resolves this vulnerability.

    Fixed in 9.0.21
  72. Upgrade

    Upgrade Microsoft.NETCore.App.Runtime.* to a version that resolves this vulnerability.

    Fixed in 10.0.13
  73. Upgrade

    Upgrade Microsoft.NETCore.App.Runtime.* to a version that resolves this vulnerability.

    Fixed in 11.0.0-rc.2
  74. Operational

    Recompile and redeploy self-contained applications targeting any impacted .NET version.

  75. Operational

    Restart applications after installing the updated .NET runtime or SDK.

Event History

Oct 13, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·06:59 PM
Data Sourced
via MITRE·06:59 PM
DescriptionSeverity
Data Sourced
via NVD·07:18 PM
DescriptionSeverityWeakness
Advisory Published
via GitHub·08:32 PM
Data Sourced
via GitHub·08:32 PM
DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

Which deployments should be prioritized for review?

Review Microsoft .NET projects that use an affected version of the identified runtime packages. The advisory applies across Windows, Linux, and macOS on all architectures.

2

What impact can successful exploitation have?

The documented impact is denial of service. The CVSS vector indicates the issue can be exploited over the network without privileges or user interaction, with availability as the affected security property.

3

What is the recommended remediation?

Update applications to a patched package version identified by the advisory. The signed XML fixes add limits on input depth and operations, disable DTD processing by default, validate entity references, and bound several XML-processing workloads.

Company

Resources

Contact

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