404 on any /_next/image request (#31052)

middleware/next.js

@@ -8,6 +8,14 @@ export const nextHandleRequest = nextApp.getRequestHandler()
 await nextApp.prepare()
 
 function renderPageWithNext(req, res, next) {
+  // We currently don't use next/image for any images.
+  // We don't even have `sharp` installed.
+  // This could change in the future but right now can just 404 on these
+  // so we don't have to deal with any other errors.
+  if (req.path.startsWith('/_next/image')) {
+    return next(404)
+  }
+
   const isNextDataRequest = req.path.startsWith('/_next') && !req.path.startsWith('/_next/data')
 
   if (isNextDataRequest) {

tests/routing/next.js

@@ -0,0 +1,12 @@
+import { describe, expect, jest, test } from '@jest/globals'
+
+import { get } from '../helpers/e2etest.js'
+
+describe('redirects', () => {
+  jest.setTimeout(60 * 1000)
+
+  test('any _next/image request should 404', async () => {
+    const res = await get('/_next/image?what=ever')
+    expect(res.statusCode).toBe(404)
+  })
+})