CVE-2026-88092

Published: Oct 13, 2026Modified: Oct 16, 2026

9.4

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Exploitability: 3.9 / Impact: 5.5

Source: secure@microsoft.com (Secondary)

Description

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

Affected (7)

Products: Microsoft: Asp.net Core, Visual Studio 2022, Visual Studio 2026

3 products

Configuration A

7 vulnerable

Vulnerable Software	Affected Versions
Microsoft Asp.net Core	version > 11.0.0
Microsoft Asp.net Core	10.0.0 ≤ version < 10.0.13
Microsoft Asp.net Core	8.0.0 ≤ version < 8.0.32
Microsoft Asp.net Core	9.0.0 ≤ version < 9.0.21
Microsoft Asp.net Core	Version 11.0 rc1
Microsoft Visual Studio 2022	17.14.0 ≤ version < 17.14.42
Microsoft Visual Studio 2026	18.10.0 ≤ version < 18.10.4

Related CWEs

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88092

Source: secure@microsoft.com

PatchVendor Advisory

Timeline

No history available yet.