CVE-2026-91839

Published: Sep 25, 2026Modified: Sep 30, 2026Deferred

7.8

Vector

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

Exploitability: 1.8 / Impact: 5.9

Source: patrick@puiterwijk.org (Secondary)

Description

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.

Related CWEs

CWE-93

Improper Neutralization of CRLF Sequences ('CRLF Injection')

The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

References (3)

https://access.redhat.com/security/cve/CVE-2026-91839

Source: patrick@puiterwijk.org

https://bugzilla.redhat.com/show_bug.cgi?id=2533640

Source: patrick@puiterwijk.org

https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80

Source: patrick@puiterwijk.org

Timeline

No history available yet.