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HTTP/2 websocket client.upgrade() hangs if the stream closes before response headers

bugSomething isn't workingSomething isn't working

Status: Open.

#5064 In nodejs/undici;

· trivikr opened on Apr 19, 2026

H2 websocket upgrade crashes process on non-200 response instead of rejecting client.upgrade()

bugSomething isn't workingSomething isn't working

Status: Open.

#5063 In nodejs/undici;

· trivikr opened on Apr 19, 2026

HTTP/2 GET/HEAD requests with a body fail with ERR_STREAM_WRITE_AFTER_END

bugSomething isn't workingSomething isn't working

Status: Open.

#5057 In nodejs/undici;

· trivikr opened on Apr 18, 2026

MockAgent as global dispatcher broken since version 8.0.3

bugSomething isn't workingSomething isn't working

Status: Open.

#5036 In nodejs/undici;

· targos opened on Apr 16, 2026

Keep-Alive max parameter prevents connection reuse

bugSomething isn't workingSomething isn't working

Status: Open.

#5022 In nodejs/undici;

· BrainTR opened on Apr 13, 2026

Request with ReadableStream body causes 'expected non-null body source' assertion failure in undici 7.x

Status: Open.

#5004 In nodejs/undici;

· satyam-mishra-pce opened on Apr 9, 2026

setEncoding('utf8') on response body corrupts multi-byte UTF-8 characters at chunk boundaries

bugSomething isn't workingSomething isn't working

Status: Open.

#5002 In nodejs/undici;

· joecwu opened on Apr 9, 2026

WebSocket: Network error cause missing

Status: Open.

#4991 In nodejs/undici;

· chrmarti opened on Apr 7, 2026

RetryHandler allows silent response body corruption via forged 206 response

bugSomething isn't workingSomething isn't working

Status: Open.

#4970 In nodejs/undici;

· samuel871211 opened on Apr 4, 2026

Regression test request: websocket / upgrade safety edge cases

Status: Open.

#4957 In nodejs/undici;

· TheWatcher01 opened on Apr 2, 2026

Use RFC 2606 TLDs for documentation and tests

Status: Open.

#4866 In nodejs/undici;

· Uzlopak opened on Mar 5, 2026

BalancedPool deteriorates to a single point of failure after outages

bugSomething isn't workingSomething isn't working

Status: Open.

#4839 In nodejs/undici;

· justSchilling opened on Feb 24, 2026