Weechat

Editors & IDEs

A lightweight, extensible chat client supporting multiple protocols and platforms.

C Latest v4.9.1 · 3d ago Security brief →

Features

Modular architecture with optional plugins (e.g., IRC) that can be loaded or unloaded on demand
Multi‑platform support: GNU/Linux, *BSD, Haiku, macOS, and Windows (via Bash/Ubuntu or Cygwin)
Protocol flexibility through plugin system – primarily supports IRC but extensible to others
Highly customizable via configuration options and scripts in Perl, Python, Ruby, Lua, Tcl, Scheme, JavaScript, PHP

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v4.9.1 Security relevant 3d

Auth RCE / SSRF

Core color fix + relay security fixes

Open

v4.9.0 Bug fix 2mo

Notable features

Full changelog

core: add option -e to evaluate all commands before executing them in command /eval
xfer: evaluate option xfer.network.own_ip

core: fix crash with /eval when the current buffer is closed in a command
core: fix buffer size in function util_parse_time, causing buffer overflow error in unit tests
irc: fix display of CTCP query sent multiple times to the same user when capability echo-message is enabled (#2309)
irc: fix unit of server option anti_flood from seconds to milliseconds in output of /server listfull
irc: fix creation of irc.msgbuffer option without a server name
irc: ignore self join if the channel is already joined (#2291)
relay/api: fix memory leaks in resources "ping" and "sync"
relay/api: fix memory leak in receive of message from remote WeeChat