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On April 1, 2020, we released a new version of Apigee Edge for Private Cloud.

> [!NOTE]
> For more information, see the following resources:
>
> - *[Edge for Private Cloud 4.18.05 documentation](https://docs.apigee.com/private-cloud/4.18.05)*
> - *Questions or issues?* Contact [Apigee Edge Support](https://docs.apigee.com/api-platform/troubleshoot/support)
> - *Release notifications* : See [Get Apigee Edge release notifications](https://docs.apigee.com/release/get-release-notifications)

## Update procedure

To update your installation, perform the following procedure on the Edge nodes:

1. On all Edge nodes:

   1. Clean the Yum repos:

      ```
      sudo yum clean all
      ```
   2. Download the latest Edge 4.18.05 `bootstrap_4.18.05.sh` file to `/tmp/bootstrap_4.18.05.sh`:

      ```
      curl https://software.apigee.com/bootstrap_4.18.05.sh -o /tmp/bootstrap_4.18.05.sh
      ```
   3. Install the Edge 4.18.05 `apigee-service` utility and dependencies:

      ```
      sudo bash /tmp/bootstrap_4.18.05.sh apigeeuser=uName apigeepassword=pWord
      ```

      Where <var translate="no">uName:pWord</var> are the username and password you received from Apigee.
      If you omit <var translate="no">pWord</var>, you will be prompted to enter it.
   4. Update the `apigee-setup` utility:

      ```
      sudo /opt/apigee/apigee-service/bin/apigee-service apigee-setup update
      ```
   5. Use the `source` command to execute the `apigee-service.sh` script:

      ```
      source /etc/profile.d/apigee-service.sh
      ```
2. Run the `update` script on each node:

   ```
   /opt/apigee/apigee-setup/bin/update.sh -c edge -f config_file
   ```

   Where <var translate="no">config_file</var> is the configuration file that you used to install Apigee Edge for Private Cloud.
   The only requirement is that the configuration file must be accessible by the "apigee"
   user.

## Supported software

None.

## Deprecations and retirements

None.

## Bugs fixed

The following table lists the bugs fixed in this release:

| Issue ID | Description |
|---|---|
| 151273325 | **Security vulnerability** Fixed security vulnerability in which multi-value request headers were being manipulated. |