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

2026

Microsoft Security Advisory CVE-2026-21218 | .NET Security Feature Bypass Vulnerability

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 8.0, .NET 9.0, and .NET 10.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. An attacker could exploit this vulnerability by crafting a malicious payload that bypasses the security checks in the affected System.Security.Cryptography.Cose versions, potentially leading to unauthorized access or data manipulation.

2024

Microsoft Security Advisory CVE-2024-43483 | .NET Denial of Service Vulnerability

Microsoft is releasing this security advisory to provide information about a vulnerability in System.Security.Cryptography.Cose, System.IO.Packaging, Microsoft.Extensions.Caching.Memory. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. System.Security.Cryptography.Cose, System.IO.Packaging, Microsoft.Extensions.Caching.Memory may be exposed to a hostile input which may lead them to be susceptible to hash flooding attacks resulting in denial of service.