Gotenberg: DNS rebinding bypasses SSRF validation on Chromium URL conversion routes_CVE-2026-42592

{
    "lastseen": "",
    "description": "Gotenberg is a Docker-powered stateless API for PDF files. Prior to 8.32.0, FilterOutboundURL resolves the hostname, checks the resolved IPs against the private-address deny-list, and returns only the error. It discards the resolved addresses. Chromium later performs its own DNS resolution when it navigates to the URL. An attacker who controls DNS for a hostname with a short TTL returns a public IP on the first query (Gotenberg allows) and a private IP on the second query (Chromium connects to the attacker-chosen internal address). The CDP Fetch.requestPaused handler re-checks the URL but runs its own DNS resolution, leaving a timing window before Chromium's actual TCP connect. The rendered internal service response returns to the caller as a PDF. This vulnerability is fixed in 8.32.0.",
    "published": "2026-05-14T15:30:34.316Z",
    "modified": "2026-05-14T15:30:34.316Z",
    "type": "cve",
    "title": "Gotenberg: DNS rebinding bypasses SSRF validation on Chromium URL conversion routes",
    "source": "GitHub_M",
    "references": "https://github.com/gotenberg/gotenberg/security/advisories/GHSA-2pmr-289p-44r3",
    "id": "CVE-2026-42592",
    "bulletinFamily": "",
    "cwe": [
        "CWE-367",
        "CWE-918"
    ],
    "cvelist": null,
    "sourceData": "gotenberg gotenberg < 8.32.0",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
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    "product": "gotenberg",
    "version": "< 8.32.0",
    "vendor": "gotenberg",
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    "ai_score": 0
}