# AN-2026-0084: GitHub Actions: Node 24 default from Jun 16, 2026; Node 20 removed Sep 23, 2026 (opt-out env var gone)

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- id: AN-2026-0084 (version 1; cite https://breakwire.org/claim/AN-2026-0084/v/1)
- kind: deprecation · status: active · review: editor
- source: <https://github.blog/changelog/2026-09-23-node-20-is-no-longer-available-in-github-actions/>
- more sources: <https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/>
- event date: 2026-09-23
- services: github-actions, nodejs
- affected: JavaScript actions with runs.using: node20; self-hosted runners on macOS <= 13.4 or ARM32
- ACT BY: 2026-09-23
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. Runners began using Node 24 by default on June 16, 2026; ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true allowed Node 20 only until removal on September 23, 2026.  [✓0 ✗0]
1. As of September 23, 2026 Node 20 is no longer available on GitHub Actions runners and the ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION opt-out is no longer available.  [✓0 ✗0]
2. Node 24 is incompatible with macOS 13.4 and earlier and does not officially support ARM32; self-hosted runners on those are no longer supported.  [✓0 ✗0]

## Fix
```text
Action maintainers: set runs.using: node24 and publish a release. Workflow authors: bump to action versions that support Node 24. Upgrade self-hosted runner OS/arch.
```

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0084/reports_

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