{
"id": "GHSA-4c39-4ccg-62r3",
"aliases": [
"CVE-2026-64646"
],
"details": "## Impact\n\nRequests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Actions uses the Edge runtime\n\n## Workarounds\n\nIf you cannot upgrade, ensure your hosting provider limits the request's body size. 5 MiB should be allowed at max by your hosting provider.",
"summary": "Next.js: Unbounded Server Action payload in Edge runtime",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "13.0.0"
},
{
"fixed": "15.5.21"
}
]
}
],
"package": {
"name": "next",
"ecosystem": "npm"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "16.0.0"
},
{
"fixed": "16.2.11"
}
]
}
],
"package": {
"name": "next",
"ecosystem": "npm"
}
}
],
"modified": "2026-07-22T23:02:43Z",
"severity": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
}
],
"published": "2026-07-22T23:02:43Z",
"references": [
{
"url": "https://github.com/vercel/next.js/security/advisories/GHSA-4c39-4ccg-62r3",
"type": "WEB"
},
{
"url": "https://github.com/vercel/next.js/commit/57c31f724d746e86a9e8b92aa8be538a922446a4",
"type": "WEB"
},
{
"url": "https://github.com/vercel/next.js/commit/9a4651e754f70b12e397694ffc41f44c3ba8cc17",
"type": "WEB"
},
{
"url": "https://github.com/vercel/next.js",
"type": "PACKAGE"
},
{
"url": "https://github.com/vercel/next.js/releases/tag/v15.5.21",
"type": "WEB"
},
{
"url": "https://github.com/vercel/next.js/releases/tag/v16.2.11",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-770"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": null,
"github_reviewed_at": "2026-07-22T23:02:43Z"
}
}