MKVToolNix v102.0 released

2026-09-14 — mosu

Hello gentle people!

An unsually short time between releases means a security fix, and that’s almost all this release is.

You can download the source code or one of the packages. The Windows packages as well as the Linux AppImage are available already. The other Linux packages & the macOS disk image are still being built and will be available over the course of the next couple of hours.

Here are the NEWS since the previous release:

Version 102.0 “Little Houses” 2026-09-14

Bug fixes

• MKVToolNix GUI: executing actions, type “execute a program”: all the variables (<MTX_…>) will now be replaced again in the argument list to the program to be executed. This was broken in v100. Fixes #6306.

Security fixes

• CVE-2026-90783: avilib: fixed potential heap overflows/invalid memory access in the ODML index handling due to unsiged integer multiplication wrapping around (colloquially known as “overflowing”) with specifically crafted AVI files. Affects only mkvmerge as the other tools do not read AVIs. Reported by Tristan Madani TristanInSec@gmail.com.

Have fun! 😁