Kestra Vulnerable to Stored Cross-Site Scripting via Flow YAML Fields_CVE-2026-33664

{
    "lastseen": "",
    "description": "Kestra is an open-source, event-driven orchestration platform Versions up to and including 1.3.3 render user-supplied flow YAML metadata fields \u2014 description, inputs[].displayName, inputs[].description \u2014 through the Markdown.vue component instantiated with html: true. The resulting HTML is injected into the DOM via Vue's v-html without any sanitization. This allows a flow author to embed arbitrary JavaScript that executes in the browser of any user who views or interacts with the flow. This is distinct from GHSA-r36c-83hm-pc8j / CVE-2026-29082, which covers only FilePreview.vue rendering .md files from execution outputs. The present finding affects different components, different data sources, and requires significantly less user interaction (zero-click for input.displayName). As of time of publication, it is unclear if a patch is available.",
    "published": "2026-03-26T21:13:12.467Z",
    "modified": "2026-03-27T13:55:17.704Z",
    "type": "cve",
    "title": "Kestra Vulnerable to Stored Cross-Site Scripting via Flow YAML Fields",
    "source": "GitHub_M",
    "references": "https://github.com/kestra-io/kestra/security/advisories/GHSA-v2mc-8q95-g7hp",
    "id": "CVE-2026-33664",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "kestra-io kestra <= 1.3.3",
    "sourceHref": "",
    "cvss": {
        "score": 7.3,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
        "version": "3.1"
    },
    "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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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "kestra",
    "version": "<= 1.3.3",
    "vendor": "kestra-io",
    "ai_description": "",
    "ai_severity": "",
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    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}