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VULNERABILITIES

CVE-2026-91838 Details

Description

A flaw was found in NetworkManager-sstp, the SSTP VPN plugin for NetworkManager. A local unprivileged user can exploit this vulnerability by embedding special characters, known as shell metacharacters, into VPN connection profile fields such as CA certificate or proxy settings. These unescaped characters are then processed by the `pppd` daemon, which runs with root privileges, allowing the attacker to execute arbitrary commands with elevated permissions when a malicious VPN connection is activated.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://gitlab.gnome.org/GNOME/network-manager-sstp/-/work_items/67 CISA-ADP
https://access.redhat.com/security/cve/CVE-2026-91838 [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2533637 [email protected]
https://gitlab.gnome.org/GNOME/network-manager-sstp/-/work_items/67 [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-91838
NVD Published Date:
Sep 25, 2026
NVD Last Modified:
Sep 25, 2026
Source:
[email protected]
CVE-2026-91838 Details - Not Deferred