Networkmanager-fortisslvpn: networkmanager-fortisslvpn: local privilege escalation to root via crlf injection in vpn profile credentials (CVE-2026-91839) | HOL Guard CVE

High · CVSS 7.8CVE-2026-91839

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

Answer in brief

CVE-2026-91839 records a High severity (CVSS 7.8) vulnerability in Networkmanager-fortisslvpn: networkmanager-fortisslvpn: local privilege escalation to root via crlf injection in vpn profile credentials. The current sources do not mark it as known exploited. The current feed maps GNOME/network-manager-fortisslvpn (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps GNOME/network-manager-fortisslvpn (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
GNOME/network-manager-fortisslvpngeneric	>=0 <*	*

Recommended response

Check inventory. Check lockfiles and deployed manifests for GNOME/network-manager-fortisslvpn.
Review the reported fix. Source-reported workaround: If the NetworkManager-fortisslvpn plugin is not required, remove the `NetworkManager-fortisslvpn` package to eliminate the attack vector. To remove the package: `sudo dnf remove NetworkManager-fortisslvpn` This action may impact systems that rely on FortiSSLVPN connectivity. A system restart may be required for the changes to take full effect.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.