# MQTTX v1.13.3 Release Notes

> Released: 2026-11-04 · Canonical: https://mqttx.app/changelogs/v1.13.3

**CLI Update Command · Security Improvements · Benchmark Fixes**

MQTTX 1.13.3 adds a CLI update command, improves Desktop and Agent security, and fixes and optimizes the CLI benchmark command.

### Update MQTTX CLI ⬆️

Run `mqttx update` to update an existing CLI installation. Standalone binaries update in place; npm and Homebrew installations use their package manager.

### Security improvements 🔒

Strengthen Agent operation approvals, script execution, and content handling, and improve API key storage and CLI download verification.

## Other improvements 🌈

**Desktop:**

- Support more payload formats for Last-Will messages.
- Show more complete operation details on Agent approval cards.

**Distribution:**

- Include `SHA256SUMS` with release downloads.

## Fixes 🛠

**CLI:**

- Correct benchmark publish and subscribe rates and active connection counts.
- Fix workloads failing to start after an initial connection retry and split-file replay stalling after a disconnect.
- Fix `%c` not using the actual ClientId in benchmark and simulation topics.
- Accept whitespace around MQTT version options.

> After upgrading, check subscriptions to topics that use `%c`.

**Desktop:**

- Correct Last-Will topics in connection history and Hex payload encoding.
- Improve Agent replies, MCP tool handling, and desktop startup compatibility.

## What's Changed

- docs: recommend the one-line MQTTX CLI installer by @ysfscream in https://github.com/emqx/MQTTX/pull/2128
- docs: give each CLI install command its own code block by @ysfscream in https://github.com/emqx/MQTTX/pull/2135
- docs: refresh Agent and Dashboard content for v1.13.2 by @ysfscream in https://github.com/emqx/MQTTX/pull/2137
- docs: restore general product documentation scope by @ysfscream in https://github.com/emqx/MQTTX/pull/2138
- fix(agent): disable raw HTML in chat replies by @ysfscream in https://github.com/emqx/MQTTX/pull/2141
- fix(agent): require approval for every script change by @ysfscream in https://github.com/emqx/MQTTX/pull/2142
- fix(desktop): harden payload script execution by @ysfscream in https://github.com/emqx/MQTTX/pull/2143
- fix(agent): keep the first MCP tool when names collide by @ysfscream in https://github.com/emqx/MQTTX/pull/2152
- fix(desktop): verify the CLI download before installing it by @ysfscream in https://github.com/emqx/MQTTX/pull/2150
- fix(agent): store the API key with the OS keychain by @ysfscream in https://github.com/emqx/MQTTX/pull/2151
- fix(desktop): sanitize changelog HTML and drop Node from the update window by @ysfscream in https://github.com/emqx/MQTTX/pull/2149
- fix(agent): stop KaTeX from rendering raw HTML in replies by @ysfscream in https://github.com/emqx/MQTTX/pull/2144
- fix(agent): show what will run on approval cards by @ysfscream in https://github.com/emqx/MQTTX/pull/2145
- fix(cli): correct benchmark rates and connection recovery by @ysfscream in https://github.com/emqx/MQTTX/pull/2153
- fix(agent): treat tool output as untrusted data by @ysfscream in https://github.com/emqx/MQTTX/pull/2147
- fix(cli): trim whitespace around MQTT version options by @ysfscream in https://github.com/emqx/MQTTX/pull/2157
- docs: clarify Agent permissions for v1.13.3 by @ysfscream in https://github.com/emqx/MQTTX/pull/2156
- fix(desktop): restrict external links and remote images by @ysfscream in https://github.com/emqx/MQTTX/pull/2148
- fix(agent): tighten approval for deletes and other state changes by @ysfscream in https://github.com/emqx/MQTTX/pull/2146
- ci(release): publish SHA256SUMS with each release by @ysfscream in https://github.com/emqx/MQTTX/pull/2155
- feat(cli): add update command by @ysfscream in https://github.com/emqx/MQTTX/pull/2154
- feat(connections): support all payload formats for Last-Will messages by @Killian0812 in https://github.com/emqx/MQTTX/pull/2140
- refactor(cli): simplify the update command by @ysfscream in https://github.com/emqx/MQTTX/pull/2158
- chore: bump version to 1.13.3 by @ysfscream in https://github.com/emqx/MQTTX/pull/2159

## New Contributors

- @Killian0812 made their first contribution in https://github.com/emqx/MQTTX/pull/2140

**Full Changelog**: https://github.com/emqx/MQTTX/compare/v1.13.2...v1.13.3