Next.js: Denial of Service in App Router using Server Actions
## Impact Crafted requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive CPU usage blocking processing of further requests in the same process. ## Workarounds No workaround exists besides upgrading. Applications using Pages Router or not using Server Actions are not vulnerable.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-64641US | high7.5 | — | ||
Next.js is a React framework for building full-stack web applications. In versions 13.0.0 through 15.5.20 and 16.0.0 through 16.2.10, crafted requests targeting Next.js application… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/vercel/next.jsPACKAGE
- https://github.com/vercel/next.js/commit/019628571641dec57aaf349ba0c360e3964e6f12WEB
- https://github.com/vercel/next.js/pull/96013WEB
- https://github.com/vercel/next.js/releases/tag/v15.5.21WEB
- https://github.com/vercel/next.js/releases/tag/v16.2.11WEB
- https://github.com/vercel/next.js/security/advisories/GHSA-m99w-x7hq-7vfjWEB
scry
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