CVE-2026-70188
CriticalCVSS 9.1Summary
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.
Risk Assessment
An attacker can bypass security controls, potentially leading to unauthorized access to applications or data.
Recommendation
Install security updates for ASP.NET Core and configure the web server to prevent smuggling attacks.
Other vulnerabilities in ASP.NET Core
See all- CVE-2017-11879High
ASP.NET Core 2.0 allows an attacker to steal log-in session information such as cookies or authentication tokens via a specially crafted URL.
- CVE-2017-0249High
An elevation of privilege vulnerability exists when ASP.NET Core fails to properly sanitize web requests.
- CVE-2026-88092Critical
Inconsistent interpretation of HTTP requests (HTTP request/response smuggling) in ASP.NET Core allows an unauthorized attacker to perform tampering over a network.
- CVE-2026-40372Critical
A vulnerability in ASP.NET Core due to improper verification of cryptographic signature allows an unauthorized attacker to elevate privileges over a network.
- CVE-2021-31957Medium
ASP.NET Core has a Denial of Service (DoS) vulnerability that could lead to service overload and unavailability.
- CVE-2020-1161High
Denial of service vulnerability in ASP.NET Core when improperly handling web requests. A remote unauthenticated attacker could send specially crafted requests, causing the application to become unavailable.
- CVE-2026-69304Medium
Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
- CVE-2026-57099High
Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.
- CVE-2026-47303High
ASP.NET Core has an authentication bypass vulnerability due to assumed-immutable data. This allows an authorized attacker to elevate privileges over a network.
- CVE-2026-47300High
Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

