diff --git a/packages/next/src/server/app-render/action-handler.ts b/packages/next/src/server/app-render/action-handler.ts
index 7bf38dfdc24a3..cd0c87c9348aa 100644
--- a/packages/next/src/server/app-render/action-handler.ts
+++ b/packages/next/src/server/app-render/action-handler.ts
@@ -501,8 +501,16 @@ export async function handleAction({
 
         if (isMultipartAction) {
           if (isFetchAction) {
+            const readableLimit = serverActions?.bodySizeLimit ?? '1 MB'
+            const limit = require('next/dist/compiled/bytes').parse(
+              readableLimit
+            )
+
             const busboy = require('busboy')
-            const bb = busboy({ headers: req.headers })
+            const bb = busboy({
+              headers: req.headers,
+              limits: { fieldSize: limit, fileSize: limit },
+            })
             req.pipe(bb)
 
             bound = await decodeReplyFromBusboy(bb, serverModuleMap)