CVE-2026-91839

Networkmanager-fortisslvpn: networkmanager-fortisslvpn: local privilege escalation to root via crlf injection in vpn profile credentials

7.8 High

A flaw was found in NetworkManager-fortisslvpn, the FortiSSLVPN plugin for NetworkManager. The nm-fortisslvpn-service improperly handles carriage-return/line-feed (CR/LF) characters in VPN connection profile credentials. A local unprivileged user can exploit this by crafting a malicious VPN profile to inject additional configuration directives. This can lead to arbitrary code execution with root privileges when the crafted VPN connection is activated.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.20%Unchanged since Sep 26, 2026

What each source reports

CVE List Score used 7.8

Networkmanager-fortisslvpn: networkmanager-fortisslvpn: local privilege escalation to root via crlf injection in vpn profile credentials

Record: CVE-2026-91839
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-93
Updated: 2026-11-02

EUVDEUVD-2026-87249 7.8

Record: EUVD-2026-87249
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-vr82-qjvf-9rrq 7.8

A flaw was found in NetworkManager-fortisslvpn, the FortiSSLVPN plugin for NetworkManager. The nm...

Record: GHSA-vr82-qjvf-9rrq
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-93
Updated: 2026-11-02

NVD 7.8

Record: CVE-2026-91839
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-93
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-91839 7.8

Record: DEBIAN-CVE-2026-91839
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-91839 7.8

Record: UBUNTU-CVE-2026-91839
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

gnome networkmanager-fortisslvpn

Affected packages

Affected packages
Package	Affected	Fixed
`network-manager-fortisslvpn` Debian:12	All versions, plus listed versions 1.4.0-0.11.4.0-11.4.0-1.1	None known
`network-manager-fortisslvpn` Ubuntu:18.04:LTS	All versions, plus listed versions 1.2.8-11.2.8-1build11.2.8-1ubuntu1	None known
`network-manager-fortisslvpn` Ubuntu:20.04:LTS	All versions, plus listed versions 1.2.8-21.2.10-0ubuntu1	None known
`network-manager-fortisslvpn` Ubuntu:22.04:LTS	All versions, plus listed versions 1.2.10-0ubuntu21.2.10-0ubuntu3	None known
`network-manager-fortisslvpn` Ubuntu:24.04:LTS	All versions, plus listed versions 1.4.0-0.11.4.0-11.4.0-1build11.4.0-1build2	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-91839 is a high vulnerability (CVSS 7.8) in Gnome Networkmanager-fortisslvpn, published September 25, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 10th percentile. No source names a fixed version.