CVE-2026-91837 Details
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.
A local privilege escalation vulnerability has been identified in the NetworkManager-iodine VPN plugin. This issue arises from the way the 'nameserver' setting is handled when establishing an iodine VPN connection. An unprivileged user can inject shell metacharacters into the 'nameserver' value, which are then executed as arbitrary commands with root privileges. This exploitation occurs before the application relinquishes elevated permissions, allowing for unauthorized command execution as the root user.
To address this vulnerability, remove the 'NetworkManager-iodine' and 'iodine' packages if they are not needed. If these packages are required, ensure that only trusted users can create and manage VPN connections.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 25, 2026CISA-ADP
Assessed Sep 25, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-91837 | [email protected] | AdvisoryRemedyVendor |
| https://bugzilla.redhat.com/show_bug.cgi?id=2533634 | [email protected] | Issue TrackingTechnical DescriptionVendor |
| https://gitlab.gnome.org/GNOME/network-manager-iodine/-/work_items/4 | [email protected] | ExploitIssue TrackingTechnical AnalysisVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-78 | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| NetworkManager-iodine | All versions |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 25, 2026 | New CVE Received | [email protected] |
| Sep 25, 2026 | CVE Modified | CISA-ADP |