AIKIDO-2026-936878
undici is vulnerable to Denial of Service (DoS)
37
Low Risk
This Affects:
undiciTL;DR
The HTTP/2 client dispatcher mishandles stream lifecycle events. A response frame delivered to a still-live stream after the request has already completed calls the response-start path post-completion, tripping an internal assert(!this.completed) that throws on the HTTP/2 event tick and escapes as an uncaught exception that crashes the process; a session that has received GOAWAY rejects new streams and crashes instead of requeuing the request, and streams aborted with close() can leave the native HTTP/2 stream handle alive on busy multiplexed sessions. A malicious or misbehaving HTTP/2 server can drive these paths to crash the client or exhaust resources. The fix guards response handling against already-completed requests, requeues requests on GOAWAY'd sessions, and deterministically destroys aborted streams.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and have HTTP/2 support enabled (for example allowH2: true).
Background info
undici is vulnerable to Denial of Service (DoS) in versions 8.3.0 - 8.6.0.
How to fix this
Upgrade the undici library to the patch version.
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SOC 2Compliant
ISO 27001Compliant