VYPR

CWE-113

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

VariantIncomplete

Description

The product receives data from an HTTP agent/component (e.g., web server, proxy, browser, etc.), but it does not neutralize or incorrectly neutralizes CR and LF characters before the data is included in outgoing HTTP headers.

Hierarchy (View 1000)

Children

none

Related attack patterns (CAPEC)

CAPEC-105 · CAPEC-31 · CAPEC-34 · CAPEC-85

CVEs mapped to this weakness (119)

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  • CVE-2020-5249MedMar 2, 2020
    risk 0.35cvss 6.5epss 0.02

    In Puma (RubyGem) before 4.3.3 and 3.12.4, if an application using Puma allows untrusted input in an early-hints header, an attacker can use a carriage return character to end the header and inject malicious content, such as additional headers or an entirely new response body.…

  • CVE-2020-5247MedFeb 28, 2020
    risk 0.35cvss 6.5epss 0.03

    In Puma (RubyGem) before 4.3.2 and before 3.12.3, if an application using Puma allows untrusted input in a response header, an attacker can use newline characters (i.e. `CR`, `LF` or`/r`, `/n`) to end the header and inject malicious content, such as additional headers or an…

  • CVE-2017-17742MedApr 3, 2018
    risk 0.35cvss 5.3epss 0.06

    Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1 allows an HTTP Response Splitting attack. An attacker can inject a crafted key and value into an HTTP response for the HTTP server of WEBrick.

  • CVE-2017-12309MedNov 16, 2017
    risk 0.35cvss 5.3epss 0.02

    A vulnerability in the Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to conduct a HTTP response splitting attack. The vulnerability is due to the failure of the application or its environment to properly sanitize input values. An attacker…

  • CVE-2026-43966MedJun 8, 2026
    risk 0.34cvss epss 0.00

    Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') vulnerability in ninenines cowlib allows HTTP response splitting via non-VCHAR bytes in structured-fields string values. cow_http_struct_hd:escape_string/2 in cowlib only escapes \ and…

  • CVE-2024-24795MedApr 4, 2024
    risk 0.34cvss 6.3epss 0.03

    HTTP Response splitting in multiple modules in Apache HTTP Server allows an attacker that can inject malicious response headers into backend applications to cause an HTTP desynchronization attack. Users are recommended to upgrade to version 2.4.59, which fixes this issue.

  • CVE-2023-48256MedJan 10, 2024
    risk 0.34cvss 5.3epss 0.00

    The vulnerability allows a remote attacker to inject arbitrary HTTP response headers or manipulate HTTP response bodies inside a victim’s session via a crafted URL or HTTP request.

  • CVE-2023-26147MedSep 29, 2023
    risk 0.34cvss 5.3epss 0.00

    All versions of the package ithewei/libhv are vulnerable to HTTP Response Splitting when untrusted user input is used to build headers values. An attacker can add the \r\n (carriage return line feeds) characters to end the HTTP response headers and inject malicious content, like…

  • CVE-2019-25101MedFeb 4, 2023
    risk 0.34cvss 6.3epss 0.01

    A vulnerability classified as critical has been found in OnShift TurboGears 1.0.11.10. This affects an unknown part of the file turbogears/controllers.py of the component HTTP Header Handler. The manipulation leads to http response splitting. It is possible to initiate the…

  • CVE-2017-7528MedAug 22, 2018
    risk 0.34cvss 5.2epss 0.01

    Ansible Tower as shipped with Red Hat CloudForms Management Engine 5 is vulnerable to CRLF Injection. It was found that X-Forwarded-For header allows internal servers to deploy other systems (using callback).

  • CVE-2024-45302MedAug 29, 2024
    risk 0.33cvss 6.1epss 0.00

    RestSharp is a Simple REST and HTTP API Client for .NET. The second argument to `RestRequest.AddHeader` (the header value) is vulnerable to CRLF injection. The same applies to `RestRequest.AddOrUpdateHeader` and `RestClient.AddDefaultHeader`. The way HTTP headers are added to a…

  • CVE-2021-40336MedJul 25, 2022
    risk 0.33cvss 5.0epss 0.00

    A vulnerability exists in the http web interface where the web interface does not validate data in an HTTP header. This causes a possible HTTP response splitting, which if exploited could lead an attacker to channel down harmful code into the user’s web browser, such as to…

  • CVE-2016-4993MedSep 26, 2016
    risk 0.33cvss 6.1epss 0.03

    CRLF injection vulnerability in the Undertow web server in WildFly 10.0.0, as used in Red Hat JBoss Enterprise Application Platform (EAP) 7.x before 7.0.2, allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified…

  • CVE-2016-0789MedApr 7, 2016
    risk 0.33cvss 6.1epss 0.02

    CRLF injection vulnerability in the CLI command documentation in Jenkins before 1.650 and LTS before 1.642.2 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified vectors.

  • CVE-2025-0588MedFeb 11, 2025
    risk 0.32cvss 4.9epss 0.00

    In affected versions of Octopus Server it was possible for a user with sufficient access to set custom headers in all server responses. By submitting a specifically crafted referrer header the user could ensure that all subsequent server responses would return 500 errors…

  • CVE-2026-44214MedMay 26, 2026
    risk 0.31cvss 5.8epss 0.00

    eventsource-encoder encodes events as well-formed EventSource/Server Sent Event (SSE) messages. Prior to 1.0.2, eventsource-encoder does not sanitize the event or id fields of an EventSourceMessage before serializing them. An attacker who controls either field can inject…

  • CVE-2026-34767MedApr 4, 2026
    risk 0.31cvss 5.9epss 0.00

    Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.3, 40.8.3, and 41.0.3, apps that register custom protocol handlers via protocol.handle() / protocol.registerSchemesAsPrivileged() or modify…

  • CVE-2022-20772MedNov 4, 2022
    risk 0.31cvss 4.7epss 0.01

    A vulnerability in Cisco Email Security Appliance (ESA) and Cisco Secure Email and Web Manager could allow an unauthenticated, remote attacker to conduct an HTTP response splitting attack. This vulnerability is due to the failure of the application or its environment to…

  • CVE-2022-37953MedAug 25, 2022
    risk 0.31cvss 4.7epss 0.00

    An HTTP response splitting vulnerability exists in the AM Gateway Challenge-Response dialog of WorkstationST (<v07.09.15) and could allow an attacker to compromise a victim's browser/session. WorkstationST is only deployed in specific, controlled environments rendering attack…

  • CVE-2020-3117MedSep 23, 2020
    risk 0.31cvss 4.7epss 0.01

    A vulnerability in the API Framework of Cisco AsyncOS for Cisco Web Security Appliance (WSA) and Cisco Content Security Management Appliance (SMA) could allow an unauthenticated, remote attacker to inject crafted HTTP headers in the web server's response. The vulnerability is…