Live › vulnerability › CVE-2026-58280
Go to dashboardA flaw in System.Security.Cryptography.Xml and System.Private.Xml in .NET lets crafted signed XML trigger uncontrolled recursion (CWE-674), which exhausts resources and crashes or stalls the process. An attacker who can send XML to an affected app gets a denial of service; the advisory does not describe code execution or data exposure.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
| Product | Ecosystem | Affected | 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 |
| Microsoft.NETCore.App.Runtime.linux-arm | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.NETCore.App.Runtime.linux-arm64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.NETCore.App.Runtime.linux-musl-arm | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.NETCore.App.Runtime.linux-musl-arm64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.NETCore.App.Runtime.linux-musl-x64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.NETCore.App.Runtime.linux-x64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.NETCore.App.Runtime.osx-arm64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.NETCore.App.Runtime.osx-x64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.NETCore.App.Runtime.win-arm | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.NETCore.App.Runtime.win-arm64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.NETCore.App.Runtime.win-x64 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.NETCore.App.Runtime.win-x86 | nuget | >= 8.0.0, <= 8.0.31 | 8.0.32 |
| Microsoft.NETCore.App.Runtime.linux-arm | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
| Microsoft.NETCore.App.Runtime.linux-arm64 | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
| Microsoft.NETCore.App.Runtime.linux-musl-arm | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
| Microsoft.NETCore.App.Runtime.linux-musl-arm64 | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
| Microsoft.NETCore.App.Runtime.linux-musl-x64 | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
| Microsoft.NETCore.App.Runtime.linux-x64 | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
| Microsoft.NETCore.App.Runtime.osx-arm64 | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
| Microsoft.NETCore.App.Runtime.osx-x64 | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
| Microsoft.NETCore.App.Runtime.win-arm | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
| Microsoft.NETCore.App.Runtime.win-arm64 | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
| Microsoft.NETCore.App.Runtime.win-x64 | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
| Microsoft.NETCore.App.Runtime.win-x86 | nuget | >= 10.0.0, <= 10.0.12 | 10.0.13 |
| Microsoft.NETCore.App.Runtime.linux-arm | nuget | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 |
| Microsoft.NETCore.App.Runtime.linux-arm64 | nuget | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 |
| Microsoft.NETCore.App.Runtime.linux-musl-arm | nuget | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 |
| Microsoft.NETCore.App.Runtime.linux-musl-arm64 | nuget | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 |
| Microsoft.NETCore.App.Runtime.linux-musl-x64 | nuget | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 |
| Microsoft.NETCore.App.Runtime.linux-x64 | nuget | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 |
| Microsoft.NETCore.App.Runtime.osx-arm64 | nuget | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 |
| Microsoft.NETCore.App.Runtime.osx-x64 | nuget | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 |
| Microsoft.NETCore.App.Runtime.win-arm | nuget | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 |
| Microsoft.NETCore.App.Runtime.win-arm64 | nuget | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 |
| Microsoft.NETCore.App.Runtime.win-x64 | nuget | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 |
| Microsoft.NETCore.App.Runtime.win-x86 | nuget | >= 11.0.0-preview.1, <= 11.0.0-rc.1 | 11.0.0-rc.2 |
Run dotnet --info and check whether the installed .NET 9 runtime is 9.0.20 or lower, or .NET 8 at 8.0.31 or lower, or .NET 10 at 10.0.12 or lower, or 11 preview/rc.1.
List package references and check for Microsoft.NETCore.App.Runtime.* at the affected versions, including self-contained publish outputs.
Check whether the app parses signed XML (System.Security.Cryptography.Xml) from untrusted input.
9.0.21, 8.0.32, 10.0.13, or 11.0.0-rc.2 or later, then restart appsEach row is the first time that source carried this signal. The analyst’s rows are its own findings.
Microsoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Xml and 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 for this issue can be found at https://github.com/dotnet/announcements/issues/447
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-674 (Uncontrolled Recursion)
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 |
This page as .md · .json · in your agent: get_signal("CVE-2026-58280")
GitHub Advisory Database, CC-BY 4.0 · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
| >= 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 | >= 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 |
| 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 | >= 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 |