CWE-1041 Base Incomplete

Use of Redundant Code

This weakness occurs when a codebase contains identical or nearly identical logic duplicated across multiple functions, methods, or modules. This redundancy creates unnecessary complexity and…

Definition

What is CWE-1041?

This weakness occurs when a codebase contains identical or nearly identical logic duplicated across multiple functions, methods, or modules. This redundancy creates unnecessary complexity and maintenance overhead.
Redundant code directly undermines maintainability and indirectly harms security. When the same logic exists in multiple places, fixing a bug or vulnerability in one location is easily missed in another, leaving the system partially patched and inconsistently protected. This inconsistency becomes a breeding ground for security gaps that are difficult to track and eliminate. For developers, the solution is to consolidate duplicate code into a single, well-defined function or service. This practice, often called the DRY (Don't Repeat Yourself) principle, ensures that fixes and security improvements are applied universally. It reduces codebase size, simplifies testing, and makes the application more secure and easier to audit over its entire lifecycle.
Real-world impact

Real-world CVEs caused by CWE-1041

No public CVE references are linked to this CWE in MITRE's catalog yet.

How attackers exploit it

Step-by-step attacker path

  1. 1

    Identify a code path that handles untrusted input without validation.

  2. 2

    Craft a payload that exercises the unsafe behavior — injection, traversal, overflow, or logic abuse.

  3. 3

    Deliver the payload through a normal request and observe the application's reaction.

  4. 4

    Iterate until the response leaks data, executes attacker code, or escalates privileges.

Vulnerable code example

Vulnerable Java

In the following Java example the code performs some complex math when specific test conditions are met. The math is the same in each case and the equations are repeated within the code. Unfortunately if a future change needs to be made then that change needs to be made in all locations. This opens the door to mistakes being made and the changes not being made in the same way in each instance.

Vulnerable Java 
public class Main {
  	public static void main(String[] args) { 
  		double s = 10.0; 
  		double r = 1.0; 
  		double pi = 3.14159; 
  		double surface_area;
  		if(r > 0.0) { 
  			// complex math equations 
  			surface_area = pi * r * s + pi * Math.pow(r, 2);
  		}
  		if(r > 1.0) { 
  			// a complex set of math 
  			surface_area = pi * r * s + pi * Math.pow(r, 2);
  		}
  	}
  }
Secure code example

Secure Java

It is recommended to place the complex math into its own function and then call that function whenever necessary.

Secure Java 
public class Main {
  	private double ComplexMath(double r, double s) { 
  		//complex math equations 
  		double pi = Math.PI; 
  		double surface_area = pi * r * s + pi * Math.pow(r, 2); 
  		return surface_area;
  	}
  	public static void main(String[] args) { 
  		double s = 10.0; 
  		double r = 1.0; 
  		double surface_area;
  		if(r > 0.0) { 
  			surface_area = ComplexMath(r, s);
  		}
  		if(r > 1.0) { 
  			surface_area = ComplexMath(r, s);
  		}
  	}
  }
What changed: the unsafe sink is replaced (or the input is validated/escaped) so the same payload no longer triggers the weakness.
Prevention checklist

How to prevent CWE-1041

  • Implementation Merge common functionality into a single function and then call that function from across the entire code base.
Detection signals

How to detect CWE-1041

SAST High

Run static analysis (SAST) on the codebase looking for the unsafe pattern in the data flow.

DAST Moderate

Run dynamic application security testing against the live endpoint.

Runtime Moderate

Watch runtime logs for unusual exception traces, malformed input, or authorization bypass attempts.

Code review Moderate

Code review: flag any new code that handles input from this surface without using the validated framework helpers.

Plexicus auto-fix

Plexicus auto-detects CWE-1041 and opens a fix PR in under 60 seconds.

Codex Remedium scans every commit, identifies this exact weakness, and ships a reviewer-ready pull request with the patch. No tickets. No hand-offs.

Get a demo Try Plexicus free
Frequently asked questions

Frequently asked questions

What is CWE-1041?

This weakness occurs when a codebase contains identical or nearly identical logic duplicated across multiple functions, methods, or modules. This redundancy creates unnecessary complexity and maintenance overhead.

How serious is CWE-1041?

MITRE has not published a likelihood-of-exploit rating for this weakness. Treat it as medium-impact until your threat model proves otherwise.

What languages or platforms are affected by CWE-1041?

MITRE has not specified affected platforms for this CWE — it can apply across most application stacks.

How can I prevent CWE-1041?

Merge common functionality into a single function and then call that function from across the entire code base.

How does Plexicus detect and fix CWE-1041?

Plexicus's SAST engine matches the data-flow signature for CWE-1041 on every commit. When a match is found, our Codex Remedium agent opens a fix PR with the corrected code, tests, and a one-line summary for the reviewer.

Where can I learn more about CWE-1041?

MITRE publishes the canonical definition at https://cwe.mitre.org/data/definitions/1041.html. You can also reference OWASP and NIST documentation for adjacent guidance.

Related weaknesses

Weaknesses related to CWE-1041

CWE-710 Parent

Improper Adherence to Coding Standards

This weakness occurs when developers don't consistently follow established coding standards and best practices, which can introduce…

CWE-1044 Sibling

Architecture with Number of Horizontal Layers Outside of Expected Range

This occurs when a software system is built with either too many or too few distinct architectural layers, falling outside a recommended…

CWE-1048 Sibling

Invokable Control Element with Large Number of Outward Calls

This weakness occurs when a single function, method, or callable code block makes an excessively high number of calls to other objects or…

CWE-1059 Sibling

Insufficient Technical Documentation

This weakness occurs when a software or hardware product lacks comprehensive technical documentation. Missing or incomplete details about…

CWE-1061 Sibling

Insufficient Encapsulation

This weakness occurs when a software component exposes too much of its internal workings, such as data structures or implementation logic.…

CWE-1065 Sibling

Runtime Resource Management Control Element in a Component Built to Run on Application Servers

This weakness occurs when an application built to run on a managed application server bypasses the server's high-level APIs and instead…

CWE-1066 Sibling

Missing Serialization Control Element

This weakness occurs when a class or data structure is marked as serializable but lacks the required control methods to properly handle…

CWE-1068 Sibling

Inconsistency Between Implementation and Documented Design

This weakness occurs when the actual code implementation deviates from the intended design described in its official documentation,…

CWE-1076 Sibling

Insufficient Adherence to Expected Conventions

This weakness occurs when software code, design, documentation, or other components fail to follow established industry or…

Resources

Further reading

Ready when you are

Don't Let Security
Weigh You Down.

Stop choosing between AI velocity and security debt. Plexicus is the only platform that runs Vibe Coding Security and ASPM in parallel — one workflow, every codebase.