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# Header Injection Policy

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

The Header Injection Policy policy adds headers to a request or response.

For configuration details, see
[Header Injection Policy](https://docs.mulesoft.com/gateway/latest/policies-included-header-injection).

## October 1, 2026

### What’s New

- Header Injection Policy policy definition version 1.3.3 is now supported by Omni Gateway.

- This release updates policy metadata only. There’s no functional change.

## February 27, 2025

### What’s New

- Header Injection Policy policy implementation version 1.2.2 is now supported by Omni Gateway.

- Header Injection Policy policy definition version 1.3.1 is now supported by Omni Gateway.