---
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title: Header Injection
collection: mulesoft
version: current
locale: ja-jp
portal_url: https://docs.salesforce.com/mulesoft/current/ja-jp/release-notes/policies/header-injection-release-notes.md
canonical_url: https://docs.mulesoft.com/jp/release-notes/policies/header-injection-release-notes
source_site: docs.mulesoft.com
content_type: documentation
content_hash: 490ad2e6b57614874ff8388245eeaef9fea2b3c2d2ec3ec09e45e49f5ad21a23
description: MuleSoft Documentation Site
latest: true
---
# Header Injection

## [](#1-3-3)1.3.3

**October 1, 2026**

### What’s New

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

## [](#1-3-1)1.3.1

**May 26, 2022**

### [](#fixed-issues)Fixed issues

- Fix policy schema not allowing additional properties via REST API.

## [](#1-3-0)1.3.0

**May 17, 2022**

### [](#new-features-and-enhancements)New Features and Enhancements

- First Flex compatible Policy.
- Separated Policy Definition from Policy Implementation. Stronger validations applied to a given policy configuration.

## [](#1-2-1)1.2.1

**Apr 30, 2020**

### [](#minimum-mule-version)Minimum Mule Version

**Mule 4.1.0**

### [](#new-features-and-enhancements-2)New Features and Enhancements

- Error handling responses revised for WSDL APIs to be compliant with SOAP 1.1 and 1.2.
- Performance improvements are made to the header manipulation engine.

### [](#fixed-issues-2)Fixed issues

- After a policy was applied, HTTP headers did not follow the RFC 2616 requirement of case-sensitivity:
    
    [https://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2](https://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2).

## [](#1-2-0)1.2.0

**September 12, 2019**

### [](#minimum-mule-version-2)Minimum Mule Version

**Mule 4.1.0**

### [](#new-features-and-enhancements-3)New Features and Enhancements

- Several performance improvements were introduced in this release.

### [](#fixed-issues-3)Fixed Issues

- An error occurred causing inbound and outbound headers to be set to lower case, ignoring the user input.

## [](#1-1-1)1.1.1

**July 12, 2019**

### [](#minimum-mule-version-3)Minimum Mule Version

**Mule 4.1.0**

### [](#new-features-and-enhancements-4)New Features and Enhancements

- Several performance improvements were introduced in this release.

## [](#1-1-0)1.1.0

**April 26, 2019**

### [](#minimum-mule-version-4)Minimum Mule Version

**Mule 4.1.0**

### [](#new-features-and-enhancements-5)New Features and Enhancements

- Introduced support for encrypting sensitive information related to the policy. The runtime version must be correctly configured to support encryption. Encryption support was introduced in Mule Runtime v4.2.0.
- Several performance improvements were introduced in this release.
- Policy weight was reduced.

## [](#1-0-1)1.0.1

**October 4, 2018**

### [](#minimum-mule-version-5)Minimum Mule Version

**Mule 4.1.0**

### [](#fixed-issues-4)Fixed Issues

- Policy parameters has an incorrect extra escaping issue.
- An `ExpressionRuntimeException` error occurred when a WSDL proxy received an empty payload, or an invalid XML.

## [](#1-0-0)1.0.0

**March 23, 2018**

### [](#minimum-mule-version-6)Minimum Mule Version

**4.1.0**

## [](#see-also)See Also

- [Header Injection Policy for Mule 4](https://docs.mulesoft.com/gateway/latest/policies-included-header-injection)
- [Header Removal Policy for Mule 4](https://docs.mulesoft.com/gateway/latest/policies-included-header-removal)
- [Known Issues](https://help.salesforce.com/s/issues)