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CVE PROGRAM SOURCE RECORD3.7 Low

CVE-2026-6733

undici vulnerable to HTTP response queue poisoning via keep-alive socket reuse

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
openjs

Description

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

undici undici

Default version status: unaffected

  • 0 to < 6.26.0affected
  • 6.26.0unaffected
  • 7.0.0 to < 7.28.0affected
  • 7.28.0unaffected
  • 8.0.0 to < 8.5.0affected
  • 8.5.0unaffected
pkg:npm/undici

References