Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vikunja | Vikunja | >= 0.21.0, < 2.2.2 |
Related Weaknesses (CWE)
References
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6q44-85gc-cjvfExploitVendor Advisory
- https://vikunja.io/changelog/vikunja-v2.2.0-was-releasedRelease Notes
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6q44-85gc-cjvfExploitVendor Advisory
FAQ
What is CVE-2026-33335?
CVE-2026-33335 is a vulnerability with a CVSS score of 8.0 (HIGH). 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 direc...
How severe is CVE-2026-33335?
CVE-2026-33335 has been rated HIGH with a CVSS base score of 8.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33335?
Check the references section above for vendor advisories and patch information. Affected products include: Vikunja Vikunja.