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Vulnerability record · CVE-2026-91839 · published 25 September 2026

CVE-2026-91839: A flaw was found in NetworkManager-fortisslvpn, the FortiSSLVPN plugin for NetworkManager.

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.

7.8 CVSS 3.1 High EPSS 0.20% · top 90.6% CWE-93 · CWE-93 Received
7.8CVSS 3.1 base score
0.20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
26 Sep 2026Last modified by NVD

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.

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

References

LinkTags
https://access.redhat.com/security/cve/CVE-2026-91839
https://bugzilla.redhat.com/show_bug.cgi?id=2533640
https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80
https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80

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Source: NIST National Vulnerability Database (record CVE-2026-91839), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.