# Mullvad VPN 2026.4 - Product: Mullvad VPN (https://whatsnew.fyi/product/mullvad-vpn) - Vendor: Mullvad - Date: 2026-08-17 - Version: 2026.4 - Original notes: https://github.com/mullvad/mullvadvpn-app/releases/tag/2026.4 - Permalink: https://whatsnew.fyi/product/mullvad-vpn/releases/2026.4 - Labels: Platforms: Desktop, Mobile What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog. Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'. --- - **added** — Add Ukrainian as a new language in the app - **added** — Aggregate installer-downloader logs by mullvad-problem-report - **changed** — Update gotatun to 0.8.1 - **changed** — Update wireguard-nt to version 1.1 on Windows - **changed** — Use arch-specific installers on macOS to deliver updates, making them approximately 50% smaller - **fixed** — Align ciphers for custom shadowsocks API access methods between clients and mullvad-daemon, with invalid access methods removed via settings migration - **fixed** — Fix split tunneling related parse error on macOS 27 - **fixed** — Fix issue where gotatun would fail to start on Linux systems with IPv6 stack disabled - **fixed** — Fix misleading split tunneling error when offline on Windows - **fixed** — Fix unhandled error on Windows: Reached the end of the file (os error 38) - **security** — Fix management interface socket being created with less restrictive permissions when using MULLVAD_MANAGEMENT_SOCKET_GROUP on Linux and macOS - **security** — Plug hole in Custom DNS firewall rules for LAN resolvers on Linux This release is for desktop only. Here is a list of all changes since last stable release [2026.3](https://github.com/mullvad/mullvadvpn-app/releases/tag/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 . ###### 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.