CWE-1115 is about source files or other code elements that do not consistently provide a prologue or header standardized for the project.
MITRE's extended description says a standard prologue may contain the module name, version number, author, date, purpose, function, assumptions, limitations, accuracy considerations and similar facts. The entry is a quality issue with no direct security implications, and mapping real vulnerabilities to it is prohibited.
How it happens
A header convention is agreed once and then applied unevenly. Some files have it, some have a stale copy, and generated or pasted files have none.
What an attacker gains
Nothing directly. MITRE lists reduced maintainability, because the issue makes the product less analyzable, and increased analytical complexity, because the lack of a prologue makes it harder to quickly and accurately understand the code. Slower understanding means slower security review.
How to find it
The record lists no detection methods. A script that checks each file for the expected header block, run in CI, finds every miss at once.
How to fix it
The record has no formal mitigations. Define a short template, include the facts a reviewer needs (purpose, assumptions, limitations), and add the check to your build. Avoid fields that go stale quickly, such as hand-maintained dates, when version control already tracks them.
Quick check
Which prologue fields are most useful for security review?
Purpose, assumptions and limitations. They tell a reviewer what the code expects from its callers.
