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Your service doesn’t crash. It just gets slower. Latency creeps up. Requests that used to take 20ms now take 120ms. p99 drifts. Throughput drops slightly. Nothing is obviously broken — but the system feels congested. You open your dashboards. And yet, something is clearly off. In many production systems, this is what Event Loop pressure looks like. Not a failure. Not an outage. But a runtime that is struggling to make forward progress. The JavaScript thread is not dead. It’s busy.

You’ve probably heard: “Node.js is single-threaded.” That statement is only partially correct. The JavaScript engine (V8) is single-threaded. Node.js as a runtime is not. Under the hood, Node.js uses multiple threads — through libuv and the operating system — to handle I/O and computationally expensive work. So the real question isn’t whether Node.js is single-threaded. It’s.

If you're running Node.js in production, you've likely heard the buzz around OpenTelemetry. It's the industry standard for observability, backed by major vendors, and it promises vendor-neutral telemetry collection across your entire stack. For many teams, it's a game-changer: finally, a unified way to collect traces, metrics, and logs without getting locked into a single vendor's ecosystem.

Node.js has updated its vulnerability reporting policy on HackerOne, introducing a minimum Signal requirement. This change aims to improve report quality, reduce operational noise, and better support the maintainers responsible for project security. Below is an explanation of why this change happened, how it works, and what it means for the security community.

January didn’t bring radical changes to Node.js, and that’s precisely why it was important. Instead of headline features, the first month of the year reinforced a clear direction for the ecosystem. Stability over novelty. Signal over noise. Security handled with context rather than urgency. For teams running Node.js in production, January delivered clarity. Here’s what actually mattered.

If you’ve recently upgraded to Debian 13 (“Trixie”) or a newer version of Ubuntu and suddenly started seeing security warnings when running apt update (or apt update --audit), don’t worry. You didn’t do anything wrong. This is a side effect of a broader security change across modern Linux distributions. SHA-1 signatures are being deprecated, and repositories that still rely on them may now trigger warnings or audits.

Modern software systems are exposed to a constant stream of disclosed vulnerabilities. Thousands of new issues are published every year across operating systems, runtimes, libraries, and frameworks. Treating all of them as equally urgent is not realistic, and trying to do so often leads to ineffective security work. To manage this volume, the security community relies on two foundational mechanisms: CVE and CVSS.

At NodeSource, we’re continuously enhancing N|Solid’s AI-powered optimization workflow, helping teams identify, validate, and implement performance improvements faster and more securely. Our latest release N|Solid 6.3.1, introduces GitHub PR and MCP (Model Context Protocol) Integrations, The Model Context Protocol (MCP) is an emerging standard that allows AI systems to communicate securely with external tools and repositories.

With the release of Node.js 24.11.0 “Krypton”, the Node.js 24 line has officially entered Long-Term Support (LTS) and will continue receiving maintenance and security updates through April 2028. This marks the beginning of a new stable era for production workloads, bringing developers enhanced security, stricter runtime behavior, and improved Web API support.

Express.js, one of the most widely used web frameworks in the Node.js ecosystem, is undergoing a major transformation. Once considered stable but stagnant, Express is now being revitalized with a clear governance model, a renewed focus on performance, and active collaboration from organizations like NodeSource.