Advisories for Nuget/System.Security.Cryptography.Xml package

2026

Microsoft Security Advisory CVE-2026-33116 – .NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

Microsoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Xml. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A vulnerability exists in EncryptedXml class where an attacker can cause an infinite loop and perform a Denial of Service attack.

Microsoft Security Advisory CVE-2026-26171 – .NET Denial of Service Vulnerability

Microsoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Xml. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A vulnerability exists in EncryptedXml class where uncontrolled resource consumption can give an attacker to the ability to perform a Denial of Service attack.

2024

.NET Information Disclosure Vulnerability

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET Core 3.1 and .NET 6.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. An information disclosure vulnerability exists in .NET Core 3.1 and .NET 6.0 that could lead to unauthorized access of privileged information. Affected software Any .NET 6.0 application running on .NET 6.0.7 or earlier. …

2022
2018

Improper Restriction of XML External Entity Reference

A denial of service vulnerability exists when .NET and .NET Core improperly process XML documents, aka ".NET and .NET Core Denial of Service Vulnerability." This affects Microsoft .NET Framework 2.0, Microsoft .NET Framework 3.0, Microsoft .NET Framework 4.7.1, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1, Microsoft .NET Framework 4.5.2, Microsoft .NET Framework 4.7/4.7.1, Microsoft .NET Framework 4.6, Microsoft .NET Framework 3.5, Microsoft .NET Framework 3.5.1, Microsoft .NET Framework 4.6/4.6.1/4.6.2, Microsoft .NET Framework 4.6.2/4.7/4.7.1, …