VYPR

CWE-444

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

BaseIncomplete

Description

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.

Hierarchy (View 1000)

Parents

Children

none

Related attack patterns (CAPEC)

CAPEC-273 · CAPEC-33

CVEs mapped to this weakness (429)

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  • CVE-2026-40560HigApr 29, 2026
    risk 0.42cvss 7.5epss 0.01

    Starman versions before 0.4018 for Perl allows HTTP Request Smuggling via Improper Header Precedence. Starman incorrectly prioritizes "Content-Length" over "Transfer-Encoding: chunked" when both headers are present in an HTTP request. Per RFC 7230 3.3.3, Transfer-Encoding must…

  • CVE-2026-24880HigApr 9, 2026
    risk 0.42cvss 7.5epss 0.01

    Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat via invalid chunk extension. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M1 through 9.0.115, from…

  • CVE-2025-65114HigApr 2, 2026
    risk 0.42cvss 7.5epss 0.00

    Apache Traffic Server allows request smuggling if chunked messages are malformed.  This issue affects Apache Traffic Server: from 9.0.0 through 9.2.12, from 10.0.0 through 10.1.1. Users are recommended to upgrade to version 9.2.13 or 10.1.2, which fix the issue.

  • CVE-2026-33870HigMar 27, 2026
    risk 0.42cvss 7.5epss 0.01

    Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final…

  • CVE-2025-59822HigSep 23, 2025
    risk 0.42cvss 7.5epss 0.00

    Http4s is a Scala interface for HTTP services. In versions from 1.0.0-M1 to before 1.0.0-M45 and before 0.23.31, http4s is vulnerable to HTTP Request Smuggling due to improper handling of HTTP trailer section. This vulnerability could enable attackers to bypass front-end servers…

  • CVE-2025-58056HigSep 3, 2025
    risk 0.42cvss 7.5epss 0.01

    Netty is an asynchronous event-driven network application framework for development of maintainable high performance protocol servers and clients. In versions 4.1.124.Final, and 4.2.0.Alpha3 through 4.2.4.Final, Netty incorrectly accepts standalone newline characters (LF) as a…

  • CVE-2025-53643HigJul 14, 2025
    risk 0.42cvss 7.5epss 0.00

    AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.12.14, the Python parser is vulnerable to a request smuggling vulnerability due to not parsing trailer sections of an HTTP request. If a pure Python version of aiohttp is installed…

  • CVE-2025-49826HigJul 3, 2025
    risk 0.42cvss 7.5epss 0.01

    Next.js is a React framework for building full-stack web applications. From versions 15.0.4-canary.51 to before 15.1.8, a cache poisoning bug leading to a Denial of Service (DoS) condition was found in Next.js. This issue does not impact customers hosted on Vercel. Under certain…

  • CVE-2025-23167MedMay 19, 2025
    risk 0.42cvss 6.5epss 0.01

    A flaw in Node.js 20's HTTP parser allows improper termination of HTTP/1 headers using `\r\n\rX` instead of the required `\r\n\r\n`. This inconsistency enables request smuggling, allowing attackers to bypass proxy-based access controls and submit unauthorized requests. The…

  • CVE-2024-53868HigApr 3, 2025
    risk 0.42cvss 7.5epss 0.01

    Apache Traffic Server allows request smuggling if chunked messages are malformed.  This issue affects Apache Traffic Server: from 9.2.0 through 9.2.9, from 10.0.0 through 10.0.4. Users are recommended to upgrade to version 9.2.10 or 10.0.5, which fixes the issue.

  • CVE-2025-31137HigApr 1, 2025
    risk 0.42cvss 7.5epss 0.01

    React Router is a multi-strategy router for React bridging the gap from React 18 to React 19. There is a vulnerability in Remix/React Router that affects all Remix 2 and React Router 7 consumers using the Express adapter. Basically, this vulnerability allows anyone to spoof the…

  • CVE-2024-6827HigMar 20, 2025
    risk 0.42cvss 7.5epss 0.01

    Gunicorn version 21.2.0 does not properly validate the value of the 'Transfer-Encoding' header as specified in the RFC standards, which leads to the default fallback method of 'Content-Length,' making it vulnerable to TE.CL request smuggling. This vulnerability can lead to cache…

  • CVE-2024-52304HigNov 18, 2024
    risk 0.42cvss 7.5epss 0.01

    aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.10.11, the Python parser parses newlines in chunk extensions incorrectly which can lead to request smuggling vulnerabilities under certain conditions. If a pure Python version of…

  • CVE-2024-35161HigJul 26, 2024
    risk 0.42cvss 7.5epss 0.01

    Apache Traffic Server forwards malformed HTTP chunked trailer section to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from…

  • CVE-2023-38522HigJul 26, 2024
    risk 0.42cvss 7.5epss 0.01

    Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache…

  • CVE-2024-34350HigMay 14, 2024
    risk 0.42cvss 7.5epss 0.01

    Next.js is a React framework that can provide building blocks to create web applications. Prior to 13.5.1, an inconsistent interpretation of a crafted HTTP request meant that requests are treated as both a single request, and two separate requests by Next.js, leading to…

  • CVE-2024-27982MedMay 7, 2024
    risk 0.42cvss 6.5epss 0.01

    The team has identified a critical vulnerability in the http server of the most recent version of Node, where malformed headers can lead to HTTP request smuggling. Specifically, if a space is placed before a content-length header, it is not interpreted correctly, enabling…

  • CVE-2024-1135HigApr 16, 2024
    risk 0.42cvss 7.5epss 0.03

    Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due…

  • CVE-2023-50811MedMar 19, 2024
    risk 0.42cvss 6.5epss 0.00

    An issue discovered in SELESTA Visual Access Manager 4.38.6 allows attackers to modify the “computer” POST parameter related to the ID of a specific reception by POST HTTP request interception. Iterating that parameter, it has been possible to access to the application and…

  • CVE-2024-27439MedMar 19, 2024
    risk 0.42cvss 6.5epss 0.01

    An error in the evaluation of the fetch metadata headers could allow a bypass of the CSRF protection in Apache Wicket. This issue affects Apache Wicket: from 9.1.0 through 9.16.0, and the milestone releases for the 10.0 series. Apache Wicket 8.x does not support CSRF protection…