GHSA-86XP-94PG-8R6R

Microsoft Security Advisory CVE-2026-92707 - ASP.NET Core Denial of Service Vulnerability

GHSA-86XP-94PG-8R6R has a CVSS score of 5.3 (Medium). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (10.0.13, 11.0.0-rc.2, 8.0.32, 9.0.21); upgrading removes the vulnerable code path.

Kodem intelligence

Already deployed Kodem?

1. What is GHSA-86XP-94PG-8R6R? GHSA-86XP-94PG-8R6R is a medium-severity security vulnerability in Microsoft.AspNetCore.SignalR.Protocols.MessagePack (nuget), affecting versions >= 10.0.0, <= 10.0.12. It is fixed in 10.0.13, 11.0.0-rc.2, 8.0.32, 9.0.21.
2. How severe is GHSA-86XP-94PG-8R6R? GHSA-86XP-94PG-8R6R has a CVSS score of 5.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of Microsoft.AspNetCore.SignalR.Protocols.MessagePack are affected by GHSA-86XP-94PG-8R6R? Microsoft.AspNetCore.SignalR.Protocols.MessagePack (nuget) versions >= 10.0.0, <= 10.0.12 is affected.
4. Is there a fix for GHSA-86XP-94PG-8R6R? Yes. GHSA-86XP-94PG-8R6R is fixed in 10.0.13, 11.0.0-rc.2, 8.0.32, 9.0.21. Upgrade to this version or later.
5. Is GHSA-86XP-94PG-8R6R exploitable, and should I be worried? Whether GHSA-86XP-94PG-8R6R is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether GHSA-86XP-94PG-8R6R is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix GHSA-86XP-94PG-8R6R?
   • Upgrade Microsoft.AspNetCore.SignalR.Protocols.MessagePack to 10.0.13 or later
   • Upgrade Microsoft.AspNetCore.SignalR.Protocols.MessagePack to 11.0.0-rc.2 or later
   • Upgrade Microsoft.AspNetCore.SignalR.Protocols.MessagePack to 8.0.32 or later
   • Upgrade Microsoft.AspNetCore.SignalR.Protocols.MessagePack to 9.0.21 or later

Other vulnerabilities in Microsoft.AspNetCore.SignalR.Protocols.MessagePack