CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') – Detailed Weakness Analysis

Explore CAPEC attack patterns referencing this CWE.

What is CWE (Common Weakness Enumeration)?

The Common Weakness Enumeration (CWE) is a community-developed list of common software and hardware weaknesses. By identifying these weaknesses, developers and security practitioners can prioritize and address potential vulnerabilities early in the development cycle. Explore our comprehensive CWE list below to better understand and mitigate common security issues.

CAPEC Patterns referencing CWE-113

Below is a list of CAPEC attack patterns associated with this CWE-113. Click on each CAPEC to learn more. The right column shows the related weaknesses (including this one).

CAPEC Related Weaknesses
HTTP Request Splitting
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
CWE-138 Improper Neutralization of Special Elements
CWE-436 Interpretation Conflict
Accessing/Intercepting/Modifying HTTP Cookies
CWE-20 Improper Input Validation
CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
CWE-302 Authentication Bypass by Assumed-Immutable Data
CWE-311 Missing Encryption of Sensitive Data
CWE-315 Cleartext Storage of Sensitive Information in a Cookie
CWE-384 Session Fixation
CWE-472 External Control of Assumed-Immutable Web Parameter
CWE-539 Use of Persistent Cookies Containing Sensitive Information
CWE-565 Reliance on Cookies without Validation and Integrity Checking
CWE-602 Client-Side Enforcement of Server-Side Security
CWE-642 External Control of Critical State Data
HTTP Response Splitting
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
CWE-138 Improper Neutralization of Special Elements
CWE-436 Interpretation Conflict
AJAX Footprinting
CWE-20 Improper Input Validation
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-86 Improper Neutralization of Invalid Characters in Identifiers in Web Pages
CWE-96 Improper Neutralization of Directives in Statically Saved Code ('Static Code Injection')
CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
CWE-116 Improper Encoding or Escaping of Output
CWE-184 Incomplete List of Disallowed Inputs
CWE-348 Use of Less Trusted Source
CWE-692 Incomplete Denylist to Cross-Site Scripting

About CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

CWE-113 is one of the established Common Weakness Enumerations that identifies a specific type of vulnerability in software. Detailed analysis of CWE-113 helps organizations understand the risks associated with this weakness and implement effective countermeasures.

Explore related attack patterns, best practices, and expert recommendations on this page. By understanding CWE-113, you can enhance your security posture and better protect your applications against exploitation.