How many CVEs have patched establishWebSocketConnection?

1 published CVEs changed establishWebSocketConnection in nodejs/undici, in 2 distinct patches totalling 2 changed lines, between 2026 and 2026.

What is the latest CVE that changed establishWebSocketConnection?

CVE-2026-19534 (undici vulnerable to Denial of Service via unrequested WebSocket subprotocol), published 2026-09-04, changed lines 195 of lib/web/websocket/connection.js.

How does establishWebSocketConnection compare to the rest of nodejs/undici?

nodejs/undici has 32 CVEs with a located fix in total; 1 of them changed establishWebSocketConnection.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

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Patched Functions
Nodejs
Undici
EstablishWebSocketConnection

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Patched Functions
Nodejs
Undici
EstablishWebSocketConnection

establishWebSocketConnection in nodejs/undici: Patched by 1 CVEs

nodejs/undici

Function

establishWebSocketConnection

Name: establishWebSocketConnection in nodejs/undici: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

lib/web/websocket/connection.js

Last patched September 4, 2026

CVEs

That changed this function

Distinct patches

Backports counted once

Lines changed

Added plus removed

2026

Years

By CVE publication date

Overview

establishWebSocketConnection in nodejs/undici was changed by 1 published CVE fixes in 2026, in 2 distinct patches that added or removed 2 lines in total.

nodejs/undici has 32 CVEs with a located fix in total, so 3% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed establishWebSocketConnection, newest first, with the lines each fix touched.

undici vulnerable to Denial of Service via unrequested WebSocket subprotocol
CVE-2026-19534 · line 195 · +1 −1
High · CVSS 7.5
EPSS 0.4%2026-09-04

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Other hotspots in the repository

Functions in nodejs/undici changed by the most CVE fixes.

processHeader3 CVEs · lib/core/request.js canCacheResponse2 CVEs · lib/handler/cache-handler.js writeH12 CVEs · lib/dispatcher/client-h1.js httpRedirectFetch2 CVEs · lib/fetch/index.js shouldRetry2 CVEs · lib/handler/retry-handler.js parseCacheControlHeader2 CVEs · lib/util/cache.js

All patched functions in nodejs/undici

Frequently asked questions

Common questions about CVE fixes to establishWebSocketConnection.

How many CVEs have patched establishWebSocketConnection?: 1 published CVEs changed establishWebSocketConnection in nodejs/undici, in 2 distinct patches totalling 2 changed lines, between 2026 and 2026.
What is the latest CVE that changed establishWebSocketConnection?: CVE-2026-19534 (undici vulnerable to Denial of Service via unrequested WebSocket subprotocol), published 2026-09-04, changed lines 195 of lib/web/websocket/connection.js.
How does establishWebSocketConnection compare to the rest of nodejs/undici?: nodejs/undici has 32 CVEs with a located fix in total; 1 of them changed establishWebSocketConnection.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

lib/web/websocket/connection.js on GitHub (opens in a new tab)
All patched functions in nodejs/undici
Patched functions directory

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

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Overview
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