📄 Mailpit Server-Side Request Forgery_PACKETSTORM:214745

{
    "lastseen": "2026-02-02T18:30:27",
    "description": "A server-side request forgery vulnerability exists in Mailpit's /proxy endpoint that allows attackers to make requests to internal network resources. Versions prior to 1.28.0 are affected...",
    "published": "2026-02-02T00:00:00",
    "modified": "2026-02-02T00:00:00",
    "type": "packetstorm",
    "title": "\ud83d\udcc4 Mailpit Server-Side Request Forgery",
    "source": "",
    "references": "",
    "id": "PACKETSTORM:214745",
    "bulletinFamily": "exploit",
    "cwe": null,
    "cvelist": [
        "CVE-2026-21859"
    ],
    "sourceData": "Mailpit - Server-Side Request Forgery (SSRF)\n    Advisory ID: RO-26-001\n    CVE ID: CVE-2026-21859\n    Severity: Medium\n    Vendor: axllent\n    Product: Mailpit\n    Version: < 1.28.0\n    \n    \n    Overview #\n    \n    A Server-Side Request Forgery (SSRF) vulnerability exists in Mailpit's /proxy endpoint that allows attackers to make requests to internal network resources.\n    \n    \n    Vulnerability Details #\n    \n    Affected Versions: < 1.28.0\n    \n    Location: /api/v1/proxy endpoint\n    \n    Affected Parameter: url\n    \n    Root Cause: The vulnerability exists due to insufficient validation of user-supplied URLs. Attackers can supply internal URLs that the server will fetch on their behalf.\n    \n    \n    Exploitation Requirements #\n    \n        No authentication required\n        Direct access to the Mailpit web interface\n    \n    Impact #\n    \n    Remote attackers can exploit this vulnerability to:\n    \n        Access internal services (databases, APIs)\n        Scan internal network resources\n        Access cloud metadata endpoints (AWS, GCP, Azure)\n        Potentially pivot to internal systems\n    \n    Proof of Concept #\n    \n    GET /api/v1/proxy?url=http://169.254.169.254/latest/meta-data/ HTTP/1.1\n    Host: mailpit.target.com\n    \n    \n    \n    Solution #\n    \n    Upgrade to Mailpit version 1.28.1 or later, which includes proper URL validation for the proxy endpoint.\n    \n    \n    References #\n    \n        GitHub Advisory\n        Mailpit Release Notes\n    \n    Timeline:\n    \n        [2026-01-06] - Discovered\n        [2026-01-07] - Reported\n        [2026-01-08] - Fixed\n    \n    Credits: Omar Kurt",
    "sourceHref": "https://packetstorm.news/download/214745",
    "cvss": {
        "score": 5.8,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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            "baseScore": 0,
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    },
    "href": "https://packetstorm.news/files/id/214745/",
    "category_name": "Exploit",
    "post_link": "",
    "product": "",
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    "vendor": "",
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    "ai_score": 0
}