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Support sending Connection header with connection-specific header names per RFC 7230

Status: Open.

#4774 In nodejs/undici;

· mcollina opened on Jan 26, 2026

Unclear whether onResponseStart() returns a bool or undefined

Status: Open.

#4773 In nodejs/undici;

· domenic opened on Jan 26, 2026

Undici WebSocket only uses undocumented onUpgrade() handler, not documented onRequestUpgrade().

bugSomething isn't workingSomething isn't working

Status: Open.

#4771 In nodejs/undici;

· domenic opened on Jan 26, 2026

Request Prioritization Interceptor

Status: Open.

#4766 In nodejs/undici;

· ronag opened on Jan 24, 2026

Type of Service (IP prioritization)

enhancementNew feature or requestNew feature or request

Status: Open.

#4765 In nodejs/undici;

· ronag opened on Jan 24, 2026

TypeError: Cannot destructure property 'socket' of 'parser.deref(...)' as it is undefined.

bugSomething isn't workingSomething isn't working

Status: Open.

#4755 In nodejs/undici;

· vbfox opened on Jan 22, 2026

WebSocket allows more than one CONNECTING connection to the same (host, port)

bugSomething isn't workingSomething isn't working

Status: Open.

#4743 In nodejs/undici;

· domenic opened on Jan 17, 2026

WebSocket transitions back from CLOSED to CLOSING

bugSomething isn't workingSomething isn't working

Status: Open.

#4742 In nodejs/undici;

· domenic opened on Jan 17, 2026

WebSocket events fire synchronously during close() instead of asynchronously

bugSomething isn't workingSomething isn't working

Status: Open.

#4741 In nodejs/undici;

· domenic opened on Jan 17, 2026

<code>fetch()</code> fails or returns an opaque response for a redirected cross-origin URL

bugSomething isn't workingSomething isn't working

Status: Open.

#4740 In nodejs/undici;

· cdoublev opened on Jan 16, 2026

<code>useH2c</code> with <code>connections</code> &gt; 1 causes HTTPParserError

bugSomething isn't workingSomething isn't working

Status: Open.

#4737 In nodejs/undici;

· rambo-panda opened on Jan 16, 2026

Schema-less HTTP_PROXY and HTTPS_PROXY env vars should maybe assume <code>http</code>

enhancementNew feature or requestNew feature or request

good first issueGood for newcomersGood for newcomers

Status: Open.

#4736 In nodejs/undici;

· williammartin opened on Jan 15, 2026