Malicious website can execute commands on the local system through XSS in the OpenCode web UI_CVE-2026-22813

{
    "lastseen": "",
    "description": "OpenCode is an open source AI coding agent. The markdown renderer used for LLM responses will insert arbitrary HTML into the DOM. There is no sanitization with DOMPurify or even a CSP on the web interface to prevent JavaScript execution via HTML injection. This means controlling the LLM response for a chat session gets JavaScript execution on the http://localhost:4096 origin. This vulnerability is fixed in 1.1.10.",
    "published": "2026-01-12T22:52:35.103Z",
    "modified": "2026-01-12T22:52:35.103Z",
    "type": "cve",
    "title": "Malicious website can execute commands on the local system through XSS in the OpenCode web UI",
    "source": "GitHub_M",
    "references": "https://github.com/anomalyco/opencode/security/advisories/GHSA-c83v-7274-4vgp",
    "id": "CVE-2026-22813",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "anomalyco opencode < 1.1.10",
    "sourceHref": "",
    "cvss": {
        "score": 9.4,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/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": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "opencode",
    "version": "< 1.1.10",
    "vendor": "anomalyco",
    "ai_description": "XSS vulnerability in OpenCode web UI allows JavaScript execution via HTML injection",
    "ai_severity": "Critical",
    "ai_vendor": "Anomaly",
    "ai_product": "OpenCode",
    "ai_version": "< 1.1.10",
    "ai_score": 9.4
}