{
"id": "GHSA-77vg-94rm-hx3p",
"aliases": [
"CVE-2026-42570"
],
"details": "`devalue.parse` could, due to quirks in some JavaScript engines, be convinced to allocate much more memory than was needed when deserializing sparse arrays, leading to excessive memory consumption.",
"summary": "Svelte devalue: DoS via sparse array deserialization",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.6.3"
},
{
"fixed": "5.8.1"
}
]
}
],
"package": {
"name": "devalue",
"ecosystem": "npm"
},
"database_specific": {
"last_known_affected_version_range": "<= 5.8.0"
}
}
],
"modified": "2026-06-09T18:41:24Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"published": "2026-05-14T20:23:47Z",
"references": [
{
"url": "https://github.com/sveltejs/devalue/security/advisories/GHSA-77vg-94rm-hx3p",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42570",
"type": "ADVISORY"
},
{
"url": "https://github.com/sveltejs/devalue/commit/206ca6712fbc380a4571c59de9ab04b91110792d",
"type": "WEB"
},
{
"url": "https://github.com/sveltejs/devalue",
"type": "PACKAGE"
},
{
"url": "https://github.com/sveltejs/devalue/releases/tag/v5.8.1",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": "2026-06-09T17:17:07Z",
"github_reviewed_at": "2026-05-14T20:23:47Z"
}
}