CVE-2026-91840Networkmanager-vpnc: networkmanager-vpnc: local privilege escalation to root via newline injection in vpn username
Updated under an hour ago ()
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It affects GNOME NetworkManager-vpnc. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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A flaw was found in NetworkManager-vpnc. This vulnerability allows a local unprivileged user to escalate privileges to root. By injecting a newline character into the VPN username field, an attacker can manipulate the vpnc configuration to execute an arbitrary program with root privileges when the malicious VPN connection is activated.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-93
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- fedora
- NVD analysis
- Deferred
- Record last updated
- Sep 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
GNOME NetworkManager-vpnc gnome:networkmanager_vpnc (from the name) | all versions | CNA record |
References
- https://access.redhat.com/security/cve/CVE-2026-91840vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2533642issue-tracking, x-refsource-redhat
- https://gitlab.gnome.org/Archive/NetworkManager-vpnc/-/work_items/19
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.