MEDIUM 5.3 Microsoft
CVE-2026-92707
MessagePack-CSharp Denial of Service Vulnerability
Microsoft Security Update 2026-Oct: MessagePack-CSharp Denial of Service Vulnerability
Affected Products
- Microsoft.AspNetCore.SignalR.Protocols.MessagePack on .NET 10.0 installed on Windows
- Microsoft.AspNetCore.SignalR.Protocols.MessagePack on .NET 10.0 installed on Linux
- Microsoft.AspNetCore.SignalR.Protocols.MessagePack on .NET 10.0 installed on Mac OS
- Microsoft.AspNetCore.SignalR.Protocols.MessagePack on .NET 11.0 installed on Windows
- Microsoft.AspNetCore.SignalR.Protocols.MessagePack on .NET 11.0 installed on Linux
- Microsoft.AspNetCore.SignalR.Protocols.MessagePack on .NET 11.0 installed on Mac OS
- Microsoft.AspNetCore.SignalR.Protocols.MessagePack on .NET 8.0 installed on Windows
- Microsoft.AspNetCore.SignalR.Protocols.MessagePack on .NET 8.0 installed on Linux
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-92707
- https://nvd.nist.gov/vuln/detail/CVE-2026-92707
This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-10-13 via Microsoft. Affected: Microsoft.AspNetCore.SignalR.Protocols.MessagePack on .NET 10.0 installed on Windows, Microsoft.AspNetCore.SignalR.Protocols.MessagePack on .NET 10.0 installed on Linux, Microsoft.AspNetCore.SignalR.Protocols.MessagePack on .NET 10.0 installed on Mac OS and 5 more.
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