---
id: CVE-2026-70188
title: >-
  Inconsistent interpretation of http requests ('http request/response
  smuggling') in ASP.NET Core allows an unauthorized attacker to bypass a
  security feature over a network.
summary: >-
  Inconsistent interpretation of http requests ('http request/response
  smuggling') in ASP.NET Core allows an unauthorized attacker to bypass a
  security feature over a network.
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-444
published: '2026-10-13'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T04:18:33.003'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70188'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70188'
    label: secure@microsoft.com
tags:
  - nvd
ingestedAt: '2026-10-13T19:43:29.023Z'
---

## Overview

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

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.