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CVE-2026-66822

NuGet · Microsoft.NETCore.App.Runtime.linux-arm

Résumé

Microsoft Security Advisory CVE-2026-66822 - .NET and Visual Studio Information Disclosure Vulnerability

Détails de l’avis

Executive summary

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

SocketsHttpHandler can retain a Proxy-Authorization header across an HTTP redirect and leak basic proxy credentials to the destination server.

Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/448

CVSS Details

  • Version: 3.1
  • Severity: Moderate
  • Score: 5.9
  • Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
  • Weakness: CWE-201 (Insertion of Sensitive Information Into Sent Data)

Affected Platforms

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

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.NETCo

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