High MSRC-CVE-2026-118747 1 CVE

.NET Denial of Service Vulnerability

Published Nov 10, 2026 · Updated Nov 11, 2026 · Revision 2

Vendor: Microsoft

Summary

Impact: Denial of Service. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

Security updates
9.0.24 — https://github.com/dotnet/runtime/security/advisories/GHSA-vmv3-wvjp-wqpj

Vulnerabilities 1

High 7.5

CVE-2026-118747

.NET Denial of Service Vulnerability

Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.

Microsoft System.Formats.Cbor dotnet7 dotnet8-runtime Ubuntu Alpine Wolfi NuGet

Nov 10, 2026

Revision history

2026-11-11 #2
Changes made to the security updates links and information. This is an informational change only.
2026-11-10 #1
Information published.

References

CVE-2026-118747 .NET Denial of Service Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118747
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss