The Mullvad Blog

Keep up to date on developments at Mullvad. New versions of our app, security updates, job posts – find it all here.

macOS 14 Sonoma firewall bug fixed!

22 September 2023  NEWS APP

The firewall bug in macOS 14 Sonoma betas and release candidates that we blogged about last week has been fixed by Apple. Read more


Bug in macOS 14 Sonoma prevents our app from working

13 September 2023  APP

The macOS 14 Sonoma betas and release candidate contain a bug that causes the firewall to not filter traffic correctly. As a result, our app does not work. Read more


Response to "TunnelCrack" vulnerability disclosure

9 August 2023  PRIVACY APP

Mullvad is mostly unaffected by the TunnelCrack VPN vulnerabilities. This is our response to the recently disclosed set of attack vectors on VPNs. Read more


Stable Quantum-resistant tunnels in the app!

6 April 2023  NEWS FEATURES APP

The quantum-resistant tunnels feature is finally stabilized and can easily be enabled for all WireGuard tunnels in our desktop app. Read more


Security audit report for our app available

21 October 2022  EXTERNAL AUDITS APP

A security assessment of the Mullvad VPN apps has concluded that the app is well-architected from a security perspective. Some issues were found, and they have been fixed to the extent possible. Read more


Android leaks connectivity check traffic

10 October 2022  PRIVACY APP

An ongoing security audit of our app identified that Android leaks certain traffic, which VPN services cannot prevent. The audit report will go public soon. This post aims to dive into the finding, called MUL22-03. Read more


Experimental post-quantum safe VPN tunnels

11 July 2022  FEATURES APP

Our latest beta (app version 2022.3-beta1) and some WireGuard servers now support VPN tunnels that protect against attackers with access to powerful quantum computers. Read more


Introducing names for easier device management

13 June 2022  FEATURES APP

The app now has an easy-to-remember two word name as its device identifier. This both solves the dreaded “too many keys”-issue and it gives users a more friendly way of identifying their devices. Read more


Possible DNS leak fixed in our Windows app

10 June 2022  APP

We found that our Windows app’s firewall rules did not properly block DNS outside the VPN tunnel when split tunneling was used. However, programs would not really use this hole or cause any leaks. Read more


Apple’s Private Relay can cause the system to ignore firewall rules

25 April 2022  PRIVACY APP

Apple’s Private Relay (Beta) feature calls home to Apple servers without respecting the firewall rules of the system, creating a leak that neither we, nor you, can stop without disabling the entire Private Relay feature. Read more



Page 1 of 2