AIKIDO-2026-891074
undici is vulnerable to Denial of Service (DoS)
59
CVE Score
Medium
Denial of Service (DoS)
TL;DR
WebSocketStream aborts its locked writable on an unclean TCP close and discards the rejection. Aborting a locked writable rejects with a TypeError, and the unobserved rejection terminates the process under Node.js's default unhandledRejection behavior. A remote peer can trigger this with a single connection teardown while the application holds a writer. The fix observes the abort result instead of leaving the rejection unhandled.
How do I fix this?
Upgrade the undici library to the patch version.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you use WebSocketStream.
Package
Versions
7.0.0 - 7.29.0
Fixed in 7.29.18.0.0 - 8.10.1
Fixed in 8.10.2Background info
undici is vulnerable to Denial of Service (DoS) in versions 7.0.0 - 7.29.0 and 8.0.0 - 8.10.1.
Links
GitHub Release
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