Mirth Connect 3.5 and above now require a minimum version of Java Runtime Environment (JRE) 8. Please ensure that you have Java 8 (or later) installed first before attempting to upgrade.

Due to the recent SWEET32 vulnerability, we've disabled cipher suites using Triple DES. If for any reason you need to use one of these cipher suites to communicate with a legacy system, you can re-enable it in mirth.properties with the https.ciphersuites setting. If you're using the SSL Manager extension, then you can choose to enable these cipher suites on a specific channel / connector rather than for the entire server. If you have any connectors using the SSL Manager that arenot using the server default cipher suites, then you will want to update these connectors and uncheck any cipher suites containing "3DES".

To address the secondary "nation state resources" theoretical use-case of the Logjam vulnerability, in 3.5 we're now setting the ephemeral Diffie-Hellman key size to 2048. If for any reason you need to change this, you can do so in mirth.properties with the https.ephemeraldhkeysize setting.

Custom attachment handlers that extend MirthAttachmentHandlerProvider will need to provide a constructor that matches and calls this super constructor:

public MirthAttachmentHandlerProvider(MessageController messageController)

Custom attachment handlers also may need to update method signatures if any of the following methods have been overridden (updated signatures on the second line of each group):

public byte[] reAttachMessage(String raw, ConnectorMessage connectorMessage, String charsetEncoding, boolean binary)
public byte[] reAttachMessage(String raw, ConnectorMessage connectorMessage, String charsetEncoding, boolean binary, boolean reattach)
 
public String reAttachMessage(ConnectorMessage message)
public String reAttachMessage(ConnectorMessage message, boolean reattach)
 
public String reAttachMessage(ImmutableConnectorMessage message)
public String reAttachMessage(ImmutableConnectorMessage message, boolean reattach)
 
public String reAttachMessage(String raw, ConnectorMessage message)
public String reAttachMessage(String raw, ConnectorMessage message, boolean reattach)
 
public String reAttachMessage(String raw, ImmutableConnectorMessage message)
public String reAttachMessage(String raw, ImmutableConnectorMessage message, boolean reattach)
 
public byte[] reAttachMessage(String raw, ImmutableConnectorMessage connectorMessage, String charsetEncoding, boolean binary)
public byte[] reAttachMessage(String raw, ImmutableConnectorMessage connectorMessage, String charsetEncoding, boolean binary, boolean reattach)