CVE-2026-91839

high

Assigned by CNA: fedora

Published 2026-09-25 · Modified 2026-09-25

Discuss on Community Propose mitigation

CVSS v3

7.8

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

7.8

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.

Predictions

Exploit likelihood

75%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Debian Security Tracker · View original ↗ · DFSG

CVE-2026-91839 NameCVE-2026-91839 Descriptioncredential newline injection permits local root code execution SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) Vulnerable and fixed packages The table below lists information on source packages. Source PackageReleaseVersionStatus…

CVE-2026-91839

Name	CVE-2026-91839
Description	credential newline injection permits local root code execution
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
network-manager-fortisslvpn (PTS)	bookworm	1.4.0-0.1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
network-manager-fortisslvpn	source	(unstable)	(unfixed)

Notes

https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80
https://blogs.gnome.org/mcatanzaro/2026/09/15/privilege-escalation-vulnerabilities-in-networkmanager-plugins/

Home - Debian Security - Source (Git)

Apply commands

text fix

Notes

https://gitlab.gnome.org/Archive/NetworkManager-fortisslvpn/-/work_items/80https://blogs.gnome.org/mcatanzaro/2026/09/15/privilege-escalation-vulnerabilities-in-networkmanager-plugins/

OS impact

Debian Affected 1 release

Version	Status	Fixed in
bookworm	Affected	—

References

CWEs

CWE-93

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.