Run static analysis (SAST) on the codebase looking for the unsafe pattern in the data flow.
CWE-1116 Base Incomplete
Inaccurate Comments
This weakness occurs when code comments do not correctly describe or explain the actual behavior of the associated code. Misleading comments create a disconnect between what the documentation says…
Definition
What is CWE-1116?
This weakness occurs when code comments do not correctly describe or explain the actual behavior of the associated code. Misleading comments create a disconnect between what the documentation says and what the program actually does.
Inaccurate comments introduce confusion and inefficiency during code reviews and security audits. Reviewers must spend extra time verifying actual behavior against stated intent, slowing down the validation process and increasing the risk that subtle logic errors or security flaws will be overlooked.
Over time, this inconsistency makes code maintenance significantly harder, indirectly harming security. It becomes more difficult to identify root causes of bugs or vulnerabilities, and developers are more likely to introduce new defects when modifying code they do not fully understand due to misleading documentation.
Real-world impact
Real-world CVEs caused by CWE-1116
No public CVE references are linked to this CWE in MITRE's catalog yet.
How attackers exploit it
Step-by-step attacker path
- 1
In the following Java example the code performs a calculation to determine how much medicine to administer. A comment is provided to give insight into what the calculation shoud be doing. Unfortunately the comment does not match the actual code and thus leaves the reader to wonder which is correct.
- 2
In the correction below, the code functionality has been verified, and the comment has been corrected to reflect the proper calculation.
- 3
Note that in real-world code, these values should be validated to disallow negative numbers, prevent integer overflow, etc.
Vulnerable code example
Vulnerable Java
In the following Java example the code performs a calculation to determine how much medicine to administer. A comment is provided to give insight into what the calculation shoud be doing. Unfortunately the comment does not match the actual code and thus leaves the reader to wonder which is correct.
public class Main {
```
public static void main(String[] args) {
int pt_weight = 83;
int mg_per_kg = 3;
int daily_dose = 0;
// Add the patient weight and Mg/Kg to calculate the correct daily dose
daily_dose = pt_weight * mg_per_kg;
return dosage;
}
} Secure code example
Secure Java
In the correction below, the code functionality has been verified, and the comment has been corrected to reflect the proper calculation.
public class Main {
```
public static void main(String[] args) {
int pt_weight = 83;
int mg_per_kg = 3;
int daily_dose = 0;
// Multiply the patient weight and Mg/Kg to calculate the correct daily dose
daily_dose = pt_weight * mg_per_kg;
return dosage;
}
} 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-1116
- Implementation Verify that each comment accurately reflects what is intended to happen during execution of the code.
Detection signals
How to detect CWE-1116
Run dynamic application security testing against the live endpoint.
Watch runtime logs for unusual exception traces, malformed input, or authorization bypass attempts.
Code review: flag any new code that handles input from this surface without using the validated framework helpers.
Plexicus auto-detects CWE-1116 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.
Frequently asked questions What is CWE-1116?
How serious is CWE-1116?
What languages or platforms are affected by CWE-1116?
How can I prevent CWE-1116?
How does Plexicus detect and fix CWE-1116?
Where can I learn more about CWE-1116?
Frequently asked questions
What is CWE-1116?
This weakness occurs when code comments do not correctly describe or explain the actual behavior of the associated code. Misleading comments create a disconnect between what the documentation says and what the program actually does.
How serious is CWE-1116?
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-1116?
MITRE has not specified affected platforms for this CWE — it can apply across most application stacks.
How can I prevent CWE-1116?
Verify that each comment accurately reflects what is intended to happen during execution of the code.
How does Plexicus detect and fix CWE-1116?
Plexicus's SAST engine matches the data-flow signature for CWE-1116 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-1116?
MITRE publishes the canonical definition at https://cwe.mitre.org/data/definitions/1116.html. You can also reference OWASP and NIST documentation for adjacent guidance.
Related weaknesses
Weaknesses related to CWE-1116
CWE-1078 Parent
Inappropriate Source Code Style or Formatting
This weakness occurs when source code violates established style guidelines for formatting, indentation, whitespace, or commenting, making…
CWE-1085 Sibling
Invokable Control Element with Excessive Volume of Commented-out Code
This weakness occurs when a callable function, method, or procedure contains a large amount of inactive, commented-out code within its…
CWE-1099 Sibling
Inconsistent Naming Conventions for Identifiers
This weakness occurs when a codebase uses mixed naming styles for elements like variables, functions, data types, or files, creating an…
CWE-1106 Sibling
Insufficient Use of Symbolic Constants
This weakness occurs when developers embed raw numbers or text strings directly in code instead of using named symbolic constants, making…
CWE-1107 Sibling
Insufficient Isolation of Symbolic Constant Definitions
This weakness occurs when a codebase uses symbolic constants (like named values for numbers or strings) but scatters their definitions…
CWE-1109 Sibling
Use of Same Variable for Multiple Purposes
This weakness occurs when a single variable is reused to handle multiple, unrelated tasks or to store different pieces of data throughout…
CWE-1113 Sibling
Inappropriate Comment Style
This weakness occurs when source code comments are written in a style or format that doesn't match the project's established standards or…
CWE-1114 Sibling
Inappropriate Whitespace Style
This weakness occurs when source code uses inconsistent or non-standard whitespace formatting, such as irregular indentation, spacing, or…
CWE-1115 Sibling
Source Code Element without Standard Prologue
This weakness occurs when source code files or modules lack a consistent, standardized header or prologue that the development team has…
Resources
Further reading
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