CVE-2026-91841: Networkmanager-vpnc: networkmanager-vpnc: incomplete fix for cve-2018-10900 allows root privilege escalation via ca-file path newline injection

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-25 · updated 2026-09-30
Weakness: CWE-93

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 products

GNOME NetworkManager-vpnc: all versions

References

https://access.redhat.com/security/cve/CVE-2026-91841
https://bugzilla.redhat.com/show_bug.cgi?id=2533651
https://gitlab.gnome.org/Archive/NetworkManager-vpnc/-/work_items/20
https://gitlab.gnome.org/Archive/NetworkManager-vpnc/-/work_items/20

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