CVE-2026-85014

A flaw was found in undici's experimental WebSocketStream client. A remote attacker, operating as an untrusted server, can trigger a Denial of Service (DoS) by closing the TCP connection without a proper WebSocket close handshake. This action causes an unhandled error in the client, leading to the termination of the entire Node.js process.

This Moderate impact flaw in the undici library's experimental WebSocketStream client can lead to a denial of service. An untrusted remote server can crash a vulnerable Node.js client application by abruptly closing a TCP connection without a WebSocket handshake. This affects the availability of applications utilizing undici in Red Hat products.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.