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NuGet package

system.security.cryptography.cose

Open actionable advisories and recorded vendor fixes. This public package view has no inventory attached and cannot establish whether your deployment is affected. A vendor fix never resolves your finding; verify your installed version and the source guidance.

Open advisories

2 actionable advisories, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

  1. High, CVSS 8.7NuGetPublished

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

    CVE-2026-21218 · GHSA-qvhc-9v3j-5rfw

    Affected
    • NuGet system.security.cryptography.cose >= 8.0.0, <= 8.0.1; >= 9.0.0, <= 9.0.12; >= 10.0.0, <= 10.0.2
    Fixed in
    9.0.138.0.210.0.3· Vendor fix available
    Issue
    Microsoft Security Advisory CVE-2026-21218 | .NET Security Feature Bypass Vulnerability <a name="executive-summary"</aExecutive summary 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. Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/380 <a name="mitigation-factors"</aMitigation factors If your application does not use System.Security.Cryptography.Cose it is not affected. By default, no .NET applications reference this component. <a name="affected-packages"</aAffected Packages The vulnerability…

    Recommended action: Upgrade to 10.0.3, 9.0.13 or 8.0.2 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:github.comSource checked Evidence →
  2. High, CVSS 8.8NuGetPublished

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

    CVE-2024-43483 · GHSA-qj66-m88j-hmgj

    Affected
    • NuGet system.security.cryptography.cose >= 9.0.0-preview.1.24080.9, <= 9.0.0-rc.1.24431.7; >= 8.0.0-preview.1.23110.8, <= 8.0.0
    Fixed in
    8.0.19.0.0-rc.2.24473.5· Vendor fix available
    Issue
    Microsoft Security Advisory CVE-2024-43483 | .NET Denial of Service Vulnerability <a name="executive-summary"</aExecutive summary 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. Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/327 <a name="mitigation-factors"</aMitigation factors Microsoft has not identified any mitigating factors for this vulnerability. <a name="affected-software"</aAffected software Any .NET 8.0 application running on .NET 8.0.8 or…

    Recommended action: Upgrade to 9.0.0-rc.2.24473.5 (pre-release) or 8.0.1 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:github.comSource checked Evidence →