CVE-2026-33335

Vikunja is an open-source self-hosted task management platform. Starting in version 0.21.0 and prior to version 2.2.0, the Vikunja Desktop Electron wrapper passes URLs from `window.open()` calls directly to `shell.openExternal()` without any validation or protocol allowlisting. An attacker who can place a link with `target="_blank"` (or that otherwise triggers `window.open`) in user-generated content can cause the victim's operating system to open arbitrary URI schemes, invoking local applications, opening local files, or triggering custom protocol handlers. Version 2.2.0 patches the issue.

Affected products

Electron, Vikunja

Vikunja

< 2.2.2

Fix

Available

CVSS 3.1

8.0 HIGH

EPSS

0.2% (16th percentile)

Weakness

CWE-939

NVD status

Analyzed

Published

2026-03-24

No exploit for CVE-2026-33335 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.