GNOME NetworkManager-vpnc CA-File Path CA-File path command injection

Summaryinfo

A vulnerability was found in GNOME NetworkManager-vpnc. It has been rated as very critical. This issue affects some unknown processing of the component CA-File Path. Performing a manipulation of the argument CA-File path results in command injection. This vulnerability was named CVE-2026-91841. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as very critical, was found in GNOME NetworkManager-vpnc (version unknown). This affects an unknown function of the component CA-File Path. The manipulation of the argument CA-File path with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-91841 since 09/15/2026. The exploitability is told to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/25/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• GNOME

Name

• NetworkManager-vpnc

License

• open-source

Website

• Vendor: https://www.gnome.org/

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