<!-- .. title: Version 2.0.19 released. .. slug: version-2-0-19-released .. date: 2024-10-02 10:46:38 UTC+1 .. tags: Releases .. category: .. link: .. description: .. type: text -->

Version 2.0.19 of Mosquitto has been released. This is a security and bugfix release.

Security

• Fix mismatched subscribe/unsubscribe with normal/shared topics.
• Fix crash on bridge using remapped topic being sent a crafted packet.
• Don't allow SUBACK with missing reason codes in client library.

Broker

• Fix assert failure when loading a persistence file that contains subscriptions with no client id.
• Fix local bridges being incorrectly expired when persistent_client_expiration is in use.
• Fix use of CLOCK_BOOTTIME for getting time. Closes #3089.
• Fix mismatched subscribe/unsubscribe with normal/shared topics.
• Fix crash on bridge using remapped topic being sent a crafted packet.

Client library

• Fix some error codes being converted to string as "unknown". Closes #2579.
• Clear SSL error state to avoid spurious error reporting. Closes #3054.
• Fix "payload format invalid" not being allowed as a PUBREC reason code.
• Don't allow SUBACK with missing reason codes.

Build

• Thread support is re-enabled on Windows.