Denial of Service Vulnerability in .NET by Microsoft
CVE-2026-69651

7.5HIGH

Key Information:

Vendor

Microsoft
Status
.net 10.0 Runtime
.net 11.0 Runtime
.net 8.0 Runtime
.net 9.0 Runtime
Vendor
CVE Published:
13 October 2026

What is CVE-2026-69651?

A vulnerability exists in the .NET Framework that allows an unauthorized attacker to exploit inefficient algorithmic complexity, potentially leading to a denial-of-service condition over a network. This flaw can be leveraged to disrupt service by overwhelming resources, impacting the availability of applications relying on the affected framework versions.

Affected Version(s)

.NET 10.0 runtime 10.0.0 < 10.0.13

.NET 11.0 runtime 11.0.0 < 11.0.0-rc.2

.NET 8.0 runtime 8.0.0 < 8.0.32

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.