SvelteKit has a memory amplification DoS in Remote Functions binary form deserializer_CVE-2026-22803

{
    "lastseen": "",
    "description": "SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From 2.49.0 to 2.49.4, the experimental form remote function uses a binary data format containing a representation of submitted form data. A specially-crafted payload can cause the server to allocate a large amount of memory, causing DoS via memory exhaustion. This vulnerability is fixed in 2.49.5.",
    "published": "2026-01-15T18:37:57.831Z",
    "modified": "2026-01-15T18:37:57.831Z",
    "type": "cve",
    "title": "SvelteKit has a memory amplification DoS in Remote Functions binary form deserializer",
    "source": "GitHub_M",
    "references": "https://github.com/sveltejs/kit/security/advisories/GHSA-j2f3-wq62-6q46\nhttps://github.com/sveltejs/kit/commit/8ed8155215b9a74012fecffb942ad9a793b274e5\nhttps://github.com/sveltejs/kit/releases/tag/@sveltejs%[email protected]",
    "id": "CVE-2026-22803",
    "bulletinFamily": "",
    "cwe": [
        "CWE-789"
    ],
    "cvelist": null,
    "sourceData": "sveltejs kit >= 2.49.0, < 2.49.5",
    "sourceHref": "",
    "cvss": {
        "score": 8.2,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/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": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "kit",
    "version": ">= 2.49.0, < 2.49.5",
    "vendor": "sveltejs",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}