Budibase: Potential SSRF DNS rebinding bypass in outbound fetch validation_CVE-2026-54353

{
    "lastseen": "",
    "description": "Budibase is an open-source low-code platform. Prior to 3.39.9, authenticated users with automation permissions can bypass Budibase's SSRF blacklist through DNS rebinding. The outbound fetch flow validates a hostname against the blacklist before the request is sent, but the actual socket connection later performs a separate DNS lookup through node-fetch. Since the validated IPs are never pinned to the connection, an attacker-controlled hostname can return a public IP during validation and a private/internal IP during the real connection. This results in a non-blind SSRF primitive against internal services reachable from the Budibase host, including loopback, RFC1918 ranges, and cloud metadata endpoints. This vulnerability is fixed in 3.39.9.",
    "published": "2026-06-26T20:44:52.069Z",
    "modified": "2026-06-26T20:44:52.069Z",
    "type": "cve",
    "title": "Budibase: Potential SSRF DNS rebinding bypass in outbound fetch validation",
    "source": "GitHub_M",
    "references": "https://github.com/Budibase/budibase/security/advisories/GHSA-gfq7-5x4g-3xhf",
    "id": "CVE-2026-54353",
    "bulletinFamily": "",
    "cwe": [
        "CWE-367",
        "CWE-918"
    ],
    "cvelist": null,
    "sourceData": "Budibase budibase < 3.39.9",
    "sourceHref": "",
    "cvss": {
        "score": 8.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N",
        "version": "3.1"
    },
    "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": "budibase",
    "version": "< 3.39.9",
    "vendor": "Budibase",
    "ai_description": "SSRF DNS rebinding bypass in outbound fetch validation",
    "ai_severity": "High",
    "ai_vendor": "Budibase",
    "ai_product": "Budibase",
    "ai_version": "< 3.39.9",
    "ai_score": 8.5
}