[deps] Platform: Update Microsoft.AspNetCore.SignalR.Protocols.MessagePack to v10.0.9 [SECURITY]#7817
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…ePack to v10.0.9 [SECURITY]
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #7817 +/- ##
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Coverage 61.25% 61.25%
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Files 2193 2193
Lines 97296 97296
Branches 8767 8767
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+ Hits 59600 59601 +1
+ Misses 35583 35582 -1
Partials 2113 2113 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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This PR contains the following updates:
[10.0.8]→[10.0.9]Microsoft Security Advisory CVE-2026-45591 – ASP.NET Core Denial of Service Vulnerability
CVE-2026-45591 / GHSA-f8h2-vmm9-qhj6
More information
Details
Executive summary
Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core SignalR and Blazor Server. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A denial of service vulnerability exists in the MessagePack hub protocol used by SignalR and Blazor Server where an attacker can send deeply-nested MessagePack arrays to cause a stack overflow, resulting in a denial of service.
Announcement
Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/405
Affected Platforms
Affected Packages
The vulnerability affects any Microsoft .NET project if it uses any of affected package versions listed below
.NET 10
Microsoft.AspNetCore.SignalR.Protocols.MessagePack (.NET 10)
.NET 9
Microsoft.AspNetCore.SignalR.Protocols.MessagePack (.NET 9)
.NET 8
Microsoft.AspNetCore.SignalR.Protocols.MessagePack (.NET 8)
Advisory FAQ
How do I know if I am affected?
If using a package listed in affected packages, you're exposed to the vulnerability.
How do I fix the issue?
dotnet --infocommand.Once you have installed the updated runtime or SDK, restart your apps for the update to take effect.
Additionally, if you've deployed self-contained applications targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.
Other Information
Reporting Security Issues
If you have found a potential security issue in a supported version of .NET, please report it to the Microsoft Security Response Center (MSRC) via the MSRC Researcher Portal. Further information can be found in the MSRC Report an Issue FAQ.
Security reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.
Support
You can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/aspnetcore. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.
Disclaimer
The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
Acknowledgements
Anonymous
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Release Notes
dotnet/dotnet (Microsoft.AspNetCore.SignalR.Protocols.MessagePack)
v10.0.9Configuration
📅 Schedule: (UTC)
🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.
♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.
🔕 Ignore: Close this PR and you won't be reminded about this update again.
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