Improperly Controlled Sequential Memory Allocation Affecting microsoft.aspnetcore.signalr.protocols.messagepack package, versions [8.0.0,8.0.32)[9.0.0,9.0.21)[10.0.0,10.0.13)[11.0.0-preview.5,11.0.0-rc.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DOTNET-MICROSOFTASPNETCORESIGNALRPROTOCOLSMESSAGEPACK-20936770
- published14 Oct 2026
- disclosed13 Oct 2026
- creditUnknown
Introduced: 13 Oct 2026
NewCVE-2026-92707 (opens in a new tab)How to fix?
Upgrade Microsoft.AspNetCore.SignalR.Protocols.MessagePack to version 8.0.32, 9.0.21, 10.0.13, 11.0.0-rc.2 or higher.
Overview
Microsoft.AspNetCore.SignalR.Protocols.MessagePack is a SignalR Hub Protocol over MsgPack.
Affected versions of this package are vulnerable to Improperly Controlled Sequential Memory Allocation in the deserialization process. An attacker can cause excessive memory consumption and disrupt service availability by sending deeply nested, attacker-controlled arrays.