High severity · published Sep 25, 2026
CVE-2026-91839
Networkmanager-fortisslvpn: networkmanager-fortisslvpn: local privilege escalation to root via crlf injection in vpn profile credentials
7.8
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
NetworkManager-fortisslvpn · GNOME
0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-91839
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91839
vdb-entry
https://access.redhat.com/security/cve/CVE-2026-91839
issue-tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2533640
gitlab.gnome.org
https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80