Version

v24.6.0

Platform

Linux msi 6.14.0-34-generic #34-Ubuntu SMP PREEMPT_DYNAMIC Wed Sep 17 09:21:29 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

Subsystem

URL or Fetch

What steps will reproduce the bug?

const u = URL.createObjectURL(new Blob(["abcde"]))
const r = await fetch(u, {headers: {range: 'bytes=1-3'}})
console.log(await r.text())
console.log(r.headers.get('content-length'))

How often does it reproduce? Is there a required condition?

No required condition.

What is the expected behavior? Why is that the expected behavior?

The last byte of the range should be included in the response. In the example above, content-length header should be 3, and the text should be "bcd".

In a browser:

What do you see instead?

The content-length header is 2, and the text is "bc".

In the Node.js console:

Additional information

No response