# CVE-2026-91837: NetworkManager-iodine command injection in nameserver option

Source: https://junglewise.ai/threats/cve-2026-91837-a-flaw-was-found-in-networkmanager-iodine-the-iodine-vpn-plugin  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-25. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-91837 · Severity: high · CVSS 7.8 · Published 2026-09-25

NetworkManager-iodine is a VPN plugin that allows users to establish iodine VPN connections. A local attacker can inject shell commands into the nameserver configuration parameter and execute them with root privileges before the application drops elevated permissions, achieving privilege escalation on the system.

Vendors: [Gnome](https://junglewise.ai/threats/vendors/gnome).

## Quick answers

**Is CVE-2026-91837 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91837 being exploited in the wild.

**How severe is CVE-2026-91837?** High severity, with a CVSS score of 7.8, published 25 September 2026.

**Which products and versions are affected?** GNOME NetworkManager-iodine.

**Is there a fix for CVE-2026-91837?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-91837 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-91837?** Check whether you run Gnome NetworkManager-iodine. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an OS command injection (CWE-78) in NetworkManager-iodine's handling of the 'nameserver' setting during VPN connection establishment. An unprivileged local user can embed shell metacharacters in the nameserver value to inject arbitrary commands that execute with root privileges before privilege dropping. No special authentication or user interaction beyond VPN connection activation is required; the fix status is not indicated in available advisory content.

## Affected products

- GNOME NetworkManager-iodine

## Timeline

- 2026-09-25: disclosed

## References

- [https://gitlab.gnome.org/GNOME/network-manager-iodine](https://gitlab.gnome.org/GNOME/network-manager-iodine)
- [https://access.redhat.com/security/cve/CVE-2026-91837](https://access.redhat.com/security/cve/CVE-2026-91837)