Vulnerability-Lookup

CVE-2026-91839 (GCVE-0-2026-91839)

Vulnerability from cvelistv5 – Published: 2026-09-25 17:56 – Updated: 2026-09-26 03:55

Title

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

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 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.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-25 00:00 UTC

CWE

CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Assigner

fedora redhat root

References

3 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-91839	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2533640	issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/Archive/NetworkManager-f…

Impacted products

1 product

Vendor	Product	Version	CPE status
GNOME	NetworkManager-fortisslvpn	Affected: 0 , < * (semver)	guessed

Date Public

2026-09-15 09:45

Credits

Red Hat would like to thank Andreas Gabriel Berbescu for reporting this issue.

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-91839

Vulnerability from fkie_nvd - Published: 2026-09-25 18:17 - Updated: 2026-09-26 04:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	patrick@puiterwijk.org	https://access.redhat.com/security/cve/CVE-2026-91839
	patrick@puiterwijk.org	https://bugzilla.redhat.com/show_bug.cgi?id=2533640
	patrick@puiterwijk.org	https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-VR82-QJVF-9RRQ

Vulnerability from github – Published: 2026-09-25 18:31 – Updated: 2026-09-25 18:31

Details

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

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  "modified": "2026-09-25T18:31:29Z",
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    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-91839"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2533640"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

UBUNTU-CVE-2026-91839 (CVE-2026-91839)

Vulnerability from osv_ubuntu – Published: 2026-09-17 00:00 – Updated: 2026-09-17 00:00 – Source website

Details

[credential newline injection permits local root code execution]

Severity

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-91839	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-91839	REPORT
	https://gitlab.gnome.org/Archive/NetworkManager-f…	REPORT
	https://blogs.gnome.org/mcatanzaro/2026/09/15/pri…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "network-manager-fortisslvpn",
        "purl": "pkg:deb/ubuntu/network-manager-fortisslvpn@1.2.8-1ubuntu1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.8-1",
        "1.2.8-1build1",
        "1.2.8-1ubuntu1"
      ]
    },
    {
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "network-manager-fortisslvpn",
        "purl": "pkg:deb/ubuntu/network-manager-fortisslvpn@1.2.10-0ubuntu1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.8-2",
        "1.2.10-0ubuntu1"
      ]
    },
    {
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "network-manager-fortisslvpn",
        "purl": "pkg:deb/ubuntu/network-manager-fortisslvpn@1.2.10-0ubuntu3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.10-0ubuntu2",
        "1.2.10-0ubuntu3"
      ]
    },
    {
      "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "network-manager-fortisslvpn",
        "purl": "pkg:deb/ubuntu/network-manager-fortisslvpn@1.4.0-1build2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.0-0.1",
        "1.4.0-1",
        "1.4.0-1build1",
        "1.4.0-1build2"
      ]
    }
  ],
  "aliases": [],
  "details": "[credential newline injection permits local root code execution]",
  "id": "UBUNTU-CVE-2026-91839",
  "modified": "2026-09-17T00:00:00Z",
  "published": "2026-09-17T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-91839"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-91839"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80"
    },
    {
      "type": "REPORT",
      "url": "https://blogs.gnome.org/mcatanzaro/2026/09/15/privilege-escalation-vulnerabilities-in-networkmanager-plugins/"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-91839"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-91839 (GCVE-0-2026-91839)

FKIE_CVE-2026-91839

GHSA-VR82-QJVF-9RRQ

UBUNTU-CVE-2026-91839 (CVE-2026-91839)

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Nomenclature

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