Vulnerability · Published Sep 25, 2026 · Assigned by fedora
CVE-2026-91837Networkmanager-iodine: networkmanager-iodine: local privilege escalation to root via nameserver option injection
High 7.8
In plain English
A high-severity OS command injection in NetworkManager-iodine from GNOME. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | network-manager-iodine | no fix listed | DEBIAN-CVE-2026-91837 |
| Debian:13 | network-manager-iodine | no fix listed | DEBIAN-CVE-2026-91837 |
| Ubuntu:22.04:LTS | network-manager-iodine | no fix listed | UBUNTU-CVE-2026-91837 |
| Ubuntu:24.04:LTS | network-manager-iodine | no fix listed | UBUNTU-CVE-2026-91837 |
| Ubuntu:26.04:LTS | network-manager-iodine | no fix listed | UBUNTU-CVE-2026-91837 |
| Ubuntu:26.10 | network-manager-iodine | no fix listed | UBUNTU-CVE-2026-91837 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GNOME | NetworkManager-iodine | 0 – before * |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://access.redhat.com/security/cve/CVE-2026-91837 vdb-entry, x_refsource_REDHAT
- RHBZ#2533634 issue-tracking, x_refsource_REDHAT
- https://gitlab.gnome.org/GNOME/network-manager-iodine/-/work_items/4