Next.js CVE-2026-44578: WebSocket upgrades on self-hosted Node.js can SSRF to internal HTTP endpoints. Vercel unaffected. Fix is 15.5.16 / 16.2.5+, or 15.5.18 / 16.2.6 for May rollup.
REST polling at 1-second intervals collapses individual executions into OHLCV bars. A receive-queue-persist pipeline over WebSocket keeps every tick, and QUIC may stabilize the connection layer.
Design notes for centrally managing 3 play PCs at an exhibition booth. Mix the management UI into HDMI multiview to fit everything on one monitor, with a Stream Deck physical console so a relief operator can take over without breaking anything.
