ASP.NET Core Tampering Vulnerability
CVE-2026-88092

9.4CRITICAL

Key Information:

Vendor

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

What is CVE-2026-88092?

Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an unauthorized attacker to perform tampering over a network.

Affected Version(s)

ASP.NET Core 10.0 10.0 < 10.0.13

ASP.NET Core 11.0 11.0 < 11.0.0-rc.2

ASP.NET Core 8.0 8.0 < 8.0.32

References

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

CVSS V3.1

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.