cvedb.io
CVE-2026-6733
LOW · CVSS 3.7
EPSS exploitation probability: 0%
Published 2026-06-17T18:18:05.473 · Last modified 2026-06-27T23:46:06.553

Summary

Impact: Undici's HTTP/1.1 client is vulnerable to response queue poisoning on reused keep-alive sockets. An attacker-controlled upstream server can inject an unsolicited HTTP/1.1 response onto an idle socket after a request completes. When the client dispatches the next request on that socket, it associates the injected response with the new request, causing responses to be delivered to the wrong requests. This requires an attacker-controlled or compromised upstream HTTP/1.1 server and keep-alive connection reuse. Patches: Upgrade to undici v6.26.0, v7.28.0 or v8.5.0. Workarounds: Disable keep-alive connection reuse by setting keepAliveTimeout: 0 on the Client or Pool.

Affected products

nodejs — undici

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.