Vulnerability · Published Sep 25, 2026 · Assigned by fedora
CVE-2026-91841Networkmanager-vpnc: networkmanager-vpnc: incomplete fix for cve-2018-10900 allows root privilege escalation via ca-file path newline injection
High 7.8
In plain English
A high-severity security flaw in NetworkManager-vpnc from GNOME. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 90.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A flaw was found in NetworkManager-vpnc, a VPN plugin for NetworkManager. A local unprivileged user can exploit this vulnerability by injecting a newline character into the CA-File path. This manipulation allows the user to execute arbitrary commands as the root user, leading to local privilege escalation.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | network-manager-vpnc | no fix listed | DEBIAN-CVE-2026-91841 |
| Debian:13 | network-manager-vpnc | no fix listed | DEBIAN-CVE-2026-91841 |
| Ubuntu:22.04:LTS | network-manager-vpnc | no fix listed | UBUNTU-CVE-2026-91841 |
| Ubuntu:24.04:LTS | network-manager-vpnc | no fix listed | UBUNTU-CVE-2026-91841 |
| Ubuntu:26.04:LTS | network-manager-vpnc | no fix listed | UBUNTU-CVE-2026-91841 |
| Ubuntu:26.10 | network-manager-vpnc | no fix listed | UBUNTU-CVE-2026-91841 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GNOME | NetworkManager-vpnc | 0 – before * |
Weakness: CWE-93 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://access.redhat.com/security/cve/CVE-2026-91841 vdb-entry, x_refsource_REDHAT
- RHBZ#2533651 issue-tracking, x_refsource_REDHAT
- https://gitlab.gnome.org/Archive/NetworkManager-vpnc/-/work_items/20