Networkmanager-sstp: networkmanager-sstp: local privilege escalation to root via shell injection in vpn profile fields
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.
CVE-2026-91838
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-91838
NetworkManager-sstp
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "GNOME",
"product": "NetworkManager-sstp",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "*",
"versionType": "semver"
}
],
"packageName": "network-manager-sstp",
"collectionURL": "https://gitlab.gnome.org/GNOME/network-manager-sstp",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-91838
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #2235 · Revision 1
- Added to Heist Feed
- Publisher date