Appsmith: SSRF via `POST /api/v1/admin/send-test-email` — JavaMail Bypasses WebClient IP Filter_CVE-2026-49979

{
    "lastseen": "",
    "description": "Appsmith is a platform to build admin panels, internal tools, and dashboards. Prior to 1.99, the POST /api/v1/admin/send-test-email endpoint accepts attacker-controlled smtpHost and smtpPort values and establishes a raw JavaMail TCP connection without any IP validation. This completely bypasses WebClientUtils.IP_CHECK_FILTER, which only applies to Spring WebClient HTTP requests. Additionally, the raw MailException.getMessage() is returned verbatim in the API error response, enabling error-based internal port scanning and service banner enumeration. This vulnerability is fixed in 1.99.",
    "published": "2026-06-24T21:38:50.890Z",
    "modified": "2026-06-24T21:38:50.890Z",
    "type": "cve",
    "title": "Appsmith: SSRF via `POST /api/v1/admin/send-test-email` \u2014 JavaMail Bypasses WebClient IP Filter",
    "source": "GitHub_M",
    "references": "https://github.com/appsmithorg/appsmith/security/advisories/GHSA-vvxf-f8q9-86gh",
    "id": "CVE-2026-49979",
    "bulletinFamily": "",
    "cwe": [
        "CWE-209",
        "CWE-918"
    ],
    "cvelist": null,
    "sourceData": "appsmithorg appsmith < 1.99",
    "sourceHref": "",
    "cvss": {
        "score": 5.1,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/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": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "appsmith",
    "version": "< 1.99",
    "vendor": "appsmithorg",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}