CVE-2026-91837 Networkmanager-iodine: networkmanager-iodine: local privilege escalation to root via nameserver option injection
Local attackers can inject shell commands via the nameserver setting in NetworkManager-iodine to execute arbitrary code with root privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91837?
CVE-2026-91837 is a high-severity command injection vulnerability in GNOME NetworkManager-iodine, published on 25 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in NetworkManager-iodine, the iodine VPN plugin for NetworkManager. A local unprivileged user can exploit a vulnerability in how the 'nameserver' setting is processed when establishing an iodine VPN connection. By embedding shell metacharacters (special characters that can execute commands) in the 'nameserver' value, an attacker can inject and execute arbitrary commands. These commands run with root privileges before the application drops its elevated permissions, leading to local privilege escalation.
Weakness: CWE-78
Which versions are affected by CVE-2026-91837?
How do I fix CVE-2026-91837?
No fix has been published for CVE-2026-91837 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-91837 being exploited?
There is no known exploitation of CVE-2026-91837 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-91837, GHSA-hrpv-95c6-mpj2, UBUNTU-CVE-2026-91837.