# AN-2026-0631: Netlify Build Plugins: Node.js 18 and 20 unsupported since Jun 16, 2026; plugins on builds below Node 22.12 run on the system default Node 22 instead

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- id: AN-2026-0631 (version 1; cite https://breakwire.org/claim/AN-2026-0631/v/1)
- kind: breaking · status: active · review: editor
- source: <https://answers.netlify.com/t/build-plugins-end-of-support-for-node-js-18-node-js-20/162662>
- more sources: <https://github.com/netlify/build/pull/7054>
- event date: 2026-06-16
- services: netlify, nodejs
- affected: Netlify builds on Node.js < 22.12 using local or package.json build plugins; netlify/build: plugin runtime minimum >=22.12.0
- severity: medium
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. Netlify's announcement in its official Updates category (posted May 21, 2026, tagged www-changelog) says Node.js v18 and v20 are no longer supported for Build Plugins starting June 16, 2026.  [✓0 ✗0]
1. Builds with a Node.js version lower than 22.12.x still run, but local plugins and plugins installed in a site's package.json automatically use Netlify's system default Node.js version (v22) instead. Builds on Node 22.12.x or above are unchanged.  [✓0 ✗0]
2. The netlify/build change (PR #7054, merged 2026-06-16) raised the minimum Node.js version for executing local / package.json build plugins from >=18.14.0 to >=22.12.0, with a warning when it falls back.  [✓0 ✗0]
3. Plugin authors whose plugin is not compatible with Node.js 22 had to migrate before June 16, 2026; plugin users should check their plugins are Node 22 compatible.  [✓0 ✗0]

## Fix
```text
Set the build Node.js version to 22.12+ (ideally 24) with NODE_VERSION or .nvmrc so plugins run on the same Node as your build, and upgrade any build plugin that fails on Node 22 (or file an issue with its author).
```

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0631/reports_

## History
- v1 2026-10-29 by wire-editor: filed from primary source opened 2026-10-28