CVE-2026-59678 Missing authorization in PortProtonQt
Attackers can mount arbitrary file systems and modify network settings due to missing authorization checks in PortProtonQt.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-59678?
CVE-2026-59678 is a high-severity missing authorization vulnerability in Linux-Gaming PortProtonQt, published on 23 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An Incorrect Authorization vulnerability in Linux-Gaming PortProtonQt allows any users to mount and unmount arbitrary file systems and modify the network configuration via NetworkManager.
This issue affects PortProtonQt before 0d0f0950ebd948cdf82e8c3e1ebd2bcb9b8bafbe.
Weakness: CWE-863
Which versions are affected by CVE-2026-59678?
Linux distribution packages (1)
portprotonqt openSUSE:Tumbleweed | All versions | 1.4.1-1.1 |
How do I fix CVE-2026-59678?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-59678 being exploited?
There is no known exploitation of CVE-2026-59678 in the wild and no public exploit code.
Sources
Also known as GHSA-7h94-344f-429f, openSUSE-SU-2026:11969-1.