Is CVE-2026-33335 actively exploited?

CVE-2026-33335 has no public evidence of in-the-wild exploitation as of 2026-03-27.

What is the CVSS score for CVE-2026-33335?

CVE-2026-33335 has a CVSS score of 6.4 (MEDIUM severity). Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2026-33335?

Patch guidance is available from vikunja security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-33335.

CVE-2026-33335 - remediation guidance & executive summary

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 Metrics

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: network
Complexity: low
Privileges: low
User Action: passive
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-939

Metadata

Primary Vendor: VIKUNJA
Published: 3/24/2026
Last Modified: 3/27/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-33335

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary