vulnerability

Ubuntu: USN-8176-1 (CVE-2026-33116): .NET vulnerabilities

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Apr 15, 2026
Added
Apr 17, 2026
Modified
Apr 17, 2026

Description

Ludvig Pedersen discovered that the System.Security.Cryptography.Xml
library in .NET incorrectly handled certain XML inputs. An attacker could
possibly use this issue to consume excessive resources, resulting in a
denial of service. (CVE-2026-33116, CVE-2026-26171)

Ludvig Pedersen and Kevin Jones discovered that the
System.Security.Cryptography.Xml library in .NET incorrectly handled
certain XML inputs. An attacker could possibly use this issue to cause
.NET to crash, resulting in a denial of service. (CVE-2026-32203)

Ludvig Pedersen discovered that the System.Net.Mail component in .NET
incorrectly handled certain inputs. An attacker could possibly use this
issue to perform a network spoofing attack. (CVE-2026-32178)

Solutions

ubuntu-upgrade-aspnetcore-runtime-10-0ubuntu-upgrade-aspnetcore-runtime-8-0ubuntu-upgrade-aspnetcore-runtime-9-0ubuntu-upgrade-dotnet-host-10-0ubuntu-upgrade-dotnet-host-8-0ubuntu-upgrade-dotnet-host-9-0ubuntu-upgrade-dotnet-hostfxr-10-0ubuntu-upgrade-dotnet-hostfxr-8-0ubuntu-upgrade-dotnet-hostfxr-9-0ubuntu-upgrade-dotnet-runtime-10-0ubuntu-upgrade-dotnet-runtime-8-0ubuntu-upgrade-dotnet-runtime-9-0ubuntu-upgrade-dotnet-sdk-10-0ubuntu-upgrade-dotnet-sdk-8-0ubuntu-upgrade-dotnet-sdk-9-0ubuntu-upgrade-dotnet-sdk-aot-10-0ubuntu-upgrade-dotnet-sdk-aot-9-0ubuntu-upgrade-dotnet10ubuntu-upgrade-dotnet8ubuntu-upgrade-dotnet9
Title
Rapid7 Labs

2026 Global Threat Landscape Report

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