Vikunja Desktop allows arbitrary local application invocation via unvalidated shell.openExternal_CVE-2026-33335

{
    "lastseen": "",
    "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.",
    "published": "2026-03-24T15:07:41.460Z",
    "modified": "2026-03-25T13:41:50.096Z",
    "type": "cve",
    "title": "Vikunja Desktop allows arbitrary local application invocation via unvalidated shell.openExternal",
    "source": "GitHub_M",
    "references": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6q44-85gc-cjvf\nhttps://vikunja.io/changelog/vikunja-v2.2.0-was-released",
    "id": "CVE-2026-33335",
    "bulletinFamily": "",
    "cwe": [
        "CWE-939"
    ],
    "cvelist": null,
    "sourceData": "go-vikunja vikunja >= 0.21.0, < 2.2.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.4,
        "severity": "MEDIUM",
        "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "attackComplexity": "",
            "privilegesRequired": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "vikunja",
    "version": ">= 0.21.0, < 2.2.0",
    "vendor": "go-vikunja",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}