Issue Description

Why reported here: This transitive dependency issue in Google.GenAI v0.6.0 was discovered while building Microsoft's official agent-framework repository, causing build failures due to TreatWarningsAsErrors=true.

See: https://github.com/microsoft/agent-framework/issues/2628​

Issue Type: 🔴 Security Vulnerability - High Severity (via NuGet audit)
Affected Package: Google.GenAI 0.6.0 (transitive dep: System.Net.Security 4.3.0)

Vulnerabilities:

GHSA-6xh7-4v2w-36q6 (High)
GHSA-qhqf-ghgh-x2m4 (High)
GHSA-ch6p-4jcm-h8vh (Moderate)
GHSA-j8f4-2w4p-mhjc (Moderate)​

Error during dotnet restore:
error NU1903: Package 'System.Net.Security' 4.3.0 has a known high severity vulnerability

Reproduction:

Clone https://github.com/microsoft/agent-framework
cd dotnet
dotnet restore (when targeting net8.0 and net9.0 frameworks)

Build fails on samples/GettingStarted/AgentProviders/Agent_With_GoogleGemini​
Impact: Blocks builds in security-conscious environments (.NET 10.0, central package management)

Request:

Please update dependencies to System.Net.Security >=4.3.2 or provide workaround pinning.