GHSA-7m27-7ghc-44w9
Next.js Allows a Denial of Service (DoS) with Server Actions
Quick fix
GHSA-7m27-7ghc-44w9 — next: upgrade to the fixed version with the command below.
npm install next@13.5.8Details
### Impact A 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.
_Note: Next.js server is idle during that time and only keeps the connection open. CPU and memory footprint are low during that time._
Deployments 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.
This 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.
This vulnerability affects only Next.js deployments using Server Actions.
### Patches
This 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.
### Workarounds
There are no official workarounds for this vulnerability.
### Credits
Thanks to the PackDraw team for responsibly disclosing this vulnerability.
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