node-fetch 2.x causes "Premature close" errors with Cloudflare-proxied responses

[matthias-praxipal]

Our Hubspot API requests started to fail loading deals this morning after cloudflare updated one of their PoPs

The SDK depends on node-fetch@^2.6.0 which has known, unfixed bugs handling chunked gzip responses (node-fetch#1767, node-fetch#1576). It seems a change in Cloudflare now causes ERR_STREAM_PREMATURE_CLOSE errors for SDK consumers with no code change on their side.

Environment

• @hubspot/api-client: 13.5.0
• Node.js: 24.17.0 (but also affects 18+)
• Runtime: Kubernetes pod (linux/amd64)
• Region: Cloudflare TXL (Berlin) PoP

Reproduction

const hubspot = require('@hubspot/api-client');
const client = new hubspot.Client({ accessToken: process.env.HUBSPOT_ACCESS_TOKEN });
// This fails with "Premature close"
client.crm.deals.basicApi.getPage(100, undefined, ['dealname'], undefined, ['companies'])
  .then(r => console.log('OK:', r.results.length))
  .catch(e => console.error('FAILED:', e.type, e.message));


We switched from basicApi.getPage() to client.apiRequest() with defaultHeaders: { 'Accept-Encoding': 'identity' } to bypass the gzip decompression path for now.

Note that defaultHeaders set on the Client constructor do not propagate to the generated API methods (basicApi.*, ownersApi.*, etc.), they only apply to apiRequest() calls.

[devel-op-er]

I've got a similar issue in my node:22-alpine container, though not related to cloudflare exactly, but gzipping itself. In my case I managed to resolve this by downgrading it from Node v22.23.0 back to v22.22.3. Apparently NodeJS released v22.23.0 yesterday and there was an automatic version upgrade (because no specific version specified), there was something in the patch that now causes ERR_STREAM_PREMATURE_CLOSE on my requests. I've set specific version node:22.22.3-alpine.

https://github.com/nodejs/node/releases/tag/v22.23.0

Seems to be working on Node v24.16 too.

[DarkNasuada]

when using node v 26.3.0 its fine, when i upgrade to v26.3.1 it breaks with:

Error [FetchError]: Invalid response body while trying to fetch https://api.hubapi.com/crm/v3/objects/tickets/search: Premature close
at ignore-listed frames {
type: 'system',
errno: 'ERR_STREAM_PREMATURE_CLOSE',
code: 'ERR_STREAM_PREMATURE_CLOSE',
constructor: [Function: FetchError]
}

Seems to be related to node-fetch v2 thats being used by hubspot internally

[xavier-symbe]

Encountering the same errors here since Friday

[nk18chi]

I ran into what appears to be the same issue with @hubspot/api-client@13.5.0

In my case:

• Node 22.22.1: works
• Node 22.23.0: fails with ERR_STREAM_PREMATURE_CLOSE
• Node 22.23.1: works again

Upgrading from Node 22.23.0 to 22.23.1 resolved the issue for me. Hopefully this helps anyone else running into the same problem.