---
id: CVE-2026-91839
title: >-
  A flaw was found in NetworkManager-fortisslvpn, the FortiSSLVPN plugin for
  NetworkManager
summary: >-
  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 unprivil…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-93
vendor: GNOME
product: network-manager-fortisslvpn
affected:
  - network-manager-fortisslvpn < *
published: '2026-09-25'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T04:17:50.317'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91839'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-91839'
    label: patrick@puiterwijk.org
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2533640'
    label: patrick@puiterwijk.org
  - url: >-
      https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80
    label: patrick@puiterwijk.org
  - url: >-
      https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91839.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-91839'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-25T18:15:37.073355Z'
exploitAvailable: true
ingestedAt: '2026-09-25T18:14:20.402Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · updated 2026-09-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91839.json)