{"id":"GHSA-7m27-7ghc-44w9","summary":"Next.js Allows a Denial of Service (DoS) with Server Actions","details":"### Impact\nA Denial of Service (DoS) attack allows attackers to construct requests that leaves requests to Server Actions hanging until the hosting provider cancels the function execution.\n\n_Note: Next.js server is idle during that time and only keeps the connection open. CPU and memory footprint are low during that time._\n\nDeployments without any protection against long running Server Action invocations are especially vulnerable. Hosting providers like Vercel or Netlify set a default maximum duration on function execution to reduce the risk of excessive billing.\n\nThis is the same issue as if the incoming HTTP request has an invalid `Content-Length` header or never closes. If the host has no other mitigations to those then this vulnerability is novel.\n\nThis vulnerability affects only Next.js deployments using Server Actions.\n\n### Patches\n\nThis vulnerability was resolved in Next.js 14.2.21, 15.1.2, and 13.5.8. We recommend that users upgrade to a safe version.\n\n### Workarounds\n\nThere are no official workarounds for this vulnerability.\n\n### Credits\n\nThanks to the PackDraw team for responsibly disclosing this vulnerability.","aliases":["CVE-2024-56332"],"modified":"2026-07-17T21:15:18.952682031Z","published":"2025-01-03T20:19:29Z","database_specific":{"github_reviewed_at":"2025-01-03T20:19:29Z","nvd_published_at":"2025-01-03T21:15:13Z","cwe_ids":["CWE-770"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/vercel/next.js/security/advisories/GHSA-7m27-7ghc-44w9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56332"},{"type":"PACKAGE","url":"https://github.com/vercel/next.js"}],"affected":[{"package":{"name":"next","ecosystem":"npm","purl":"pkg:npm/next"},"ranges":[{"type":"SEMVER","events":[{"introduced":"13.0.0"},{"fixed":"13.5.8"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/01/GHSA-7m27-7ghc-44w9/GHSA-7m27-7ghc-44w9.json"}},{"package":{"name":"next","ecosystem":"npm","purl":"pkg:npm/next"},"ranges":[{"type":"SEMVER","events":[{"introduced":"14.0.0"},{"fixed":"14.2.21"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/01/GHSA-7m27-7ghc-44w9/GHSA-7m27-7ghc-44w9.json"}},{"package":{"name":"next","ecosystem":"npm","purl":"pkg:npm/next"},"ranges":[{"type":"SEMVER","events":[{"introduced":"15.0.0"},{"fixed":"15.1.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/01/GHSA-7m27-7ghc-44w9/GHSA-7m27-7ghc-44w9.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}