CVE-2026-91839

HIGH 7.8

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

CVSS Score

7.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-93
Vendor	gnome
Product	networkmanager-fortisslvpn
Published	Sep 25, 2026
Last Updated	Sep 25, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

GNOME / NetworkManager-fortisslvpn

0 < *

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

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