> ## Documentation Index
> Fetch the complete documentation index at: https://docs.canton.network/llms.txt
> Use this file to discover all available pages before exploring further.

# 3.5.19

> Canton 3.5.19 release notes.

# Release of Canton 3.5.19

Canton 3.5.19 has been released on September 23, 2026.

## Summary

This is a maintenance release that brings improvements to CantonBFT.

## What’s New

### CantonBFT Improvements

* Raised some log thresholds around epoch/topology transition to INFO to troubleshoot issues with the orderer
  not being able to make progress in some scenarios.
* Fixed an OutputModule memory leak caused by abandoned block state during recovery and view changes.
* Fixed race conditions in the creation of P2P connections that could lead to warnings
  and P2P connection management misbehavior.
* Limit how many commit certificates are sent in a single retransmission message to avoid exceeding the maximum message size.

### Minor Improvements

* Bump AWS SDK version to 2.55.2 to address a security vulnerability in a dependency

## Compatibility

The following Canton protocol versions are supported:

| Dependency               | Version |
| ------------------------ | ------- |
| Canton protocol versions | 34, 35  |

Canton has been tested against the following versions of its dependencies:

| Dependency   | Version                                                                                                                                                                                                                                             |
| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Java Runtime | OpenJDK 64-Bit Server VM (build 21.0.12+2-nixos, mixed mode, sharing)                                                                                                                                                                               |
| Postgres     | Recommended: PostgreSQL 17.11 (Debian 17.11-1.pgdg13+2) – Also tested: PostgreSQL 14.24 (Debian 14.24-1.pgdg13+2), PostgreSQL 15.19 (Debian 15.19-1.pgdg13+2), PostgreSQL 16.15 (Debian 16.15-1.pgdg13+2), PostgreSQL 18.6 (Debian 18.6-1.pgdg13+2) |