CVE-2026-91839CWE-93

CVE-2026-91839

High · published September 25, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
9.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00204 · 9.9th percentile
Weakness
CWE-93 · Improper Neutralization of CRLF Sequences ('CRLF Injection')
Published
2026-09-25T22:17Z
References (3)
https://access.redhat.com/security/cve/CVE-2026-91839 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2533640 · [email protected]https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80 · [email protected]
EPSS history
Timeline
  • 27 SEP 03:28Z
    EPSS moved — → 0%
    epss
  • 25 SEP 17:56Z
    Networkmanager-fortisslvpn: networkmanager-fortisslvpn: local privilege escalation to root via crlf injection in vpn profile credentials
    cvelistv5