vnotex VNote up to 4.2.x External Program viewareacontroller.cpp fetchCommand os command injection

Summaryinfo

A vulnerability described as problematic has been identified in vnotex VNote up to 4.2.x. This issue affects the function SessionConfig::ExternalProgram::fetchCommand of the file src/controllers/viewareacontroller.cpp of the component External Program. Executing a manipulation can lead to os command injection. This vulnerability is tracked as CVE-2026-86022. The attack is restricted to local execution. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in vnotex VNote up to 4.2.x and classified as problematic. This vulnerability affects the function SessionConfig::ExternalProgram::fetchCommand of the file src/controllers/viewareacontroller.cpp of the component External Program. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

VNote is a note-taking platform. Prior to 4.3.0, SessionConfig::ExternalProgram::fetchCommand wraps a note path in double quotes and substitutes it into a command string that QProcess::start(const QString&) reparses into arguments through ProcessUtils::startDetached. The automatic path in src/controllers/viewareacontroller.cpp and the Open With path in src/controllers/notebooknodecontroller.cpp both reach this sink. On Linux and macOS, an attacker-controlled double quote in a POSIX note filename can terminate the quoted path and add arguments to the victim's configured external program. If the configured program supports an argument that executes commands, such as the vim or gvim -c option, the injected arguments can execute arbitrary commands as the user. This issue is fixed in version 4.3.0.

The advisory is available at github.com. This vulnerability was named CVE-2026-86022 since 09/04/2026. The exploitation appears to be easy. Local access is required to approach this attack. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading to version 4.3.0 eliminates this vulnerability.

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Productinfo

Vendor

• vnotex

Name

• VNote

Version

• 4.0
• 4.1
• 4.2

Website

• Product: https://github.com/vnotex/vnote/

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