---
description: Data Loss Prevention (DLP) source code detection now targets whole file uploads and downloads with improved accuracy and configurable confidence levels.
title: Source code detection improvements
image: https://developers.cloudflare.com/changelog/post/2026-07-10-source-code-detection-improvements/og.png?v=773962528a675fc5
---

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July 10, 2026

## Source code detection improvements

[Data Loss Prevention](https://developers.cloudflare.com/cloudflare-one/data-loss-prevention/)

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Data Loss Prevention (DLP) source code detection now focuses on identifying whole source code file uploads and downloads. Previously, source code detection performed partial scans resulting in a higher rate of false positives. Since only whole source code files are evaluated, code embedded in other content — such as chat messages, documentation, or code samples — is no longer flagged as source code, removing a common source of false positives.

Source code detection requires a minimum of 500 characters to evaluate a file. Files below this threshold are not flagged to reduce noise. This threshold filters out small fragments that lack enough context for reliable classification.

Enable and set [confidence levels](https://developers.cloudflare.com/cloudflare-one/data-loss-prevention/dlp-profiles/advanced-settings/#confidence-thresholds) to tune match sensitivity. A higher confidence level reduces false positives by requiring stronger signals that the content is truly source code. A lower confidence level catches more files at the cost of additional noise.

Source code detection applies to standalone source code files in [Gateway HTTP policies](https://developers.cloudflare.com/cloudflare-one/traffic-policies/http-policies/). It does not detect source code embedded within other file types or payloads, such as `.docx` files or chat messages.

For more information, refer to [Source Code predefined profiles](https://developers.cloudflare.com/cloudflare-one/data-loss-prevention/dlp-profiles/predefined-profiles/#source-code).

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