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UBUNTU-CVE-2026-91839

Type: advisorySource: OSV1 source record

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.

Announced 25 Sept 2026Group revision 1

Original source ↗

UBUNTU-CVE-2026-91839

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: osv:UBUNTU-CVE-2026-91839

network-manager-fortisslvpn

Source reference: /affected/0/package/name

Affected versions: 1.2.8-1
Source reference: /affected/0/versions
1.2.8-1build1
Source reference: /affected/0/versions
1.2.8-1ubuntu1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

network-manager-fortisslvpn

Source reference: /affected/1/package/name

Affected versions: 1.2.8-2
Source reference: /affected/1/versions
1.2.10-0ubuntu1
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

network-manager-fortisslvpn

Source reference: /affected/2/package/name

Affected versions: 1.2.10-0ubuntu2
Source reference: /affected/2/versions
1.2.10-0ubuntu3
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

network-manager-fortisslvpn

Source reference: /affected/3/package/name

Affected versions: 1.4.0-0.1
Source reference: /affected/3/versions
1.4.0-1
Source reference: /affected/3/versions
1.4.0-1build1
Source reference: /affected/3/versions
1.4.0-1build2
Source reference: /affected/3/versions
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.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "network-manager-fortisslvpn",
      "purl": "pkg:deb/ubuntu/network-manager-fortisslvpn?arch=source&distro=bionic",
      "ecosystem": "Ubuntu:18.04:LTS"
    },
    "versions": [
      "1.2.8-1",
      "1.2.8-1build1",
      "1.2.8-1ubuntu1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91839.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "network-manager-fortisslvpn",
          "binary_version": "1.2.8-1ubuntu1"
        },
        {
          "binary_name": "network-manager-fortisslvpn-gnome",
          "binary_version": "1.2.8-1ubuntu1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "network-manager-fortisslvpn",
      "purl": "pkg:deb/ubuntu/network-manager-fortisslvpn?arch=source&distro=focal",
      "ecosystem": "Ubuntu:20.04:LTS"
    },
    "versions": [
      "1.2.8-2",
      "1.2.10-0ubuntu1"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91839.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "network-manager-fortisslvpn",
          "binary_version": "1.2.10-0ubuntu1"
        },
        {
          "binary_name": "network-manager-fortisslvpn-gnome",
          "binary_version": "1.2.10-0ubuntu1"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "network-manager-fortisslvpn",
      "purl": "pkg:deb/ubuntu/network-manager-fortisslvpn?arch=source&distro=jammy",
      "ecosystem": "Ubuntu:22.04:LTS"
    },
    "versions": [
      "1.2.10-0ubuntu2",
      "1.2.10-0ubuntu3"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91839.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "network-manager-fortisslvpn",
          "binary_version": "1.2.10-0ubuntu3"
        },
        {
          "binary_name": "network-manager-fortisslvpn-gnome",
          "binary_version": "1.2.10-0ubuntu3"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "network-manager-fortisslvpn",
      "purl": "pkg:deb/ubuntu/network-manager-fortisslvpn?arch=source&distro=noble",
      "ecosystem": "Ubuntu:24.04:LTS"
    },
    "versions": [
      "1.4.0-0.1",
      "1.4.0-1",
      "1.4.0-1build1",
      "1.4.0-1build2"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91839.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "network-manager-fortisslvpn",
          "binary_version": "1.4.0-1build2"
        },
        {
          "binary_name": "network-manager-fortisslvpn-gnome",
          "binary_version": "1.4.0-1build2"
        }
      ]
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #51966 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 14:36:48 GMT
Publisher date: Fri, 25 Sep 2026 18:17:00 GMT

Read the original announcement

Revision history

25 Oct 2026UBUNTU-CVE-2026-91839 · Revision 1Source updated