This release is for desktop only. Here is a list of all changes since last stable release 2026.3: Added

• Add Ukrainian as a new language in the app.
• installer-downloader logs are aggregated by mullvad-problem-report. Changed
• Update gotatun to 0.8.1. Windows
• Update wireguard-nt to version 1.1. This retires the Mullvad fork at https://github.com/mullvad/wireguard-nt. macOS
• Use arch-specific installers to deliver updates. This makes updates around 50% smaller. Fixed
• Align ciphers for custom shadowsocks API access methods between clients and mullvad-daemon. Any existing, invalid access method is removed with a settings migration. macOS
• Fix split tunneling related parse error on macOS 27. Linux
• Fix issue where gotatun would fail to start on Linux systems where the IPv6 stack had been disabled. Windows
• Fix misleading "split tunneling" error when offline.
• Fix unhandled error: "Reached the end of the file. (os error 38)" Security
• Linux and macOS: Fix management interface socket being created with less restrictive permissions when using MULLVAD_MANAGEMENT_SOCKET_GROUP. This addresses the advisory GHSA-p9rr-wc9m-qmwg. Linux
• Plug hole in Custom DNS firewall rules for LAN resolvers.