Allocation of Resources Without Limits or Throttling Affecting microsoft.aspnetcore.signalr.common 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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- published14 Oct 2026
- disclosed13 Oct 2026
- creditnono, Vincent55 Yang
Introduced: 13 Oct 2026
NewCVE-2026-70159 (opens in a new tab)How to fix?
Upgrade Microsoft.AspNetCore.SignalR.Common to version 8.0.32, 9.0.21, 10.0.13, 11.0.0-rc.2 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the MessageBuffer.ResendAsync process. An attacker can cause indefinite blocking of broadcasts and resource exhaustion by exploiting backpressure mechanisms in stateful reconnect clients.