NUGET · JULY 2026 · EARLY WARNING

.NET Security Feature Bypass Vulnerability Under Investigation

EARLY WARNING · UNCONFIRMED. This page describes a developing threat that 0Day surfaced from early signals and has not yet independently confirmed. Details may change. Always verify against the primary sources before acting.

CVE-2026-50528GHSA-QVW7-JM5C-6HQWSeverity: HIGH

An early warning has been issued regarding a potential security feature bypass vulnerability in.NET 8,.NET 9, and.NET 10 when processing TLS/SSL connections. The vulnerability, reportedly affecting specific NuGet packages, is under investigation.

What happened

An early warning has been issued for a potential security feature bypass vulnerability in.NET 8,.NET 9, and.NET 10. The vulnerability appears to affect the SslStream implementation, allowing an attacker to bypass authorization checks during secure communication. The affected components include several NuGet packages for Linux ARM, ARM64, and x64 architectures. The vulnerability is tracked under CVE-2026-50528 and GHSA-QVW7-JM5C-6HQW. Users are advised to consult the primary sources for more detailed information and recommended actions.

How 0Day mitigates this

MATCHED TO YOUR ACTUAL DEPENDENCY GRAPH0Day matches every incoming threat signal against your GitHub organization’s full dependency graph, including transitive dependencies. If microsoft.netcore.app.runtime.linux-arm is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.

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