Missing Authentication for Critical Function in @agenticmail/mcp_CVE-2026-50287

{
    "lastseen": "",
    "description": "AgenticMail gives AI agents real email addresses and phone numbers. Prior to version 0.9.27, @agenticmail/mcp exposes a Streamable HTTP transport when started with --http or MCP_HTTP=1. In that mode, the /mcp endpoint accepts requests without any HTTP authentication layer. A remote client can initialize a session and call tools directly. This issue has been patched in version 0.9.27.",
    "published": "2026-06-12T18:44:48.313Z",
    "modified": "2026-06-12T18:44:48.313Z",
    "type": "cve",
    "title": "Missing Authentication for Critical Function in @agenticmail/mcp",
    "source": "GitHub_M",
    "references": "https://github.com/agenticmail/agenticmail/security/advisories/GHSA-63gr-g7jc-v8rg",
    "id": "CVE-2026-50287",
    "bulletinFamily": "",
    "cwe": [
        "CWE-306"
    ],
    "cvelist": null,
    "sourceData": "agenticmail agenticmail < 0.9.27",
    "sourceHref": "",
    "cvss": {
        "score": 8.7,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
        "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": "agenticmail",
    "version": "< 0.9.27",
    "vendor": "agenticmail",
    "ai_description": "Missing authentication vulnerability in @agenticmail/mcp, allowing remote clients to initialize sessions and call tools without authentication.",
    "ai_severity": "High",
    "ai_vendor": "agenticmail",
    "ai_product": "@agenticmail/mcp",
    "ai_version": "< 0.9.27",
    "ai_score": 8.7
}