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CVE-2026-109855Published

undici is an HTTP client library for Node.js. In versions 8.11.0 and 8.11.1, its experimental WebSocket client, which is enabled by default when HTTP/2 is allowed, mishandles a failed WebSocket handshake over HTTP/2: the request is already …

Exact source revision recorded 27 Oct 2026 16:45:50 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

nvd · CVE-2026-109855

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-248 · CWE-754

Original publisher date fields

published: 2026-10-15T09:17:16.573

lastModified: 2026-10-19T20:46:49.400

1 source CPE criteria · context only
  • cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

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An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 30 Oct 15:55 UTC · 272 of 272 readable · 271 fully read · documentation 469/469 current

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