The Node.js ecosystem has undergone a silent but profound transformation with the arrival of npm 12, a version that radically changes the rules of the game by disabling the installation scripts (preinstall, install and postinstall) by default. What was once an automatic and comfortable behavior for developers has become too high a security risk, as demonstrated by the Shai-Hulud worm that compromised more than 500 packages in 2025. This article analyzes the impact of this decision, how it affects development teams, and what strategies to follow to migrate without breaking productivity, all from a professional perspective and with references to services such as those offered by Q2BSTUDIO.
The main new feature of npm 12 is that installation scripts are no longer executed unless they are explicitly authorized by an allowlist that is saved in the package.json. In addition, Git dependencies and those that come from remote tarballs are also blocked by default. This is a paradigm shift: security is no longer an optional add-on, but the basis of the installation flow. For many businesses, especially those working with microservices or monorepos, this transition can be painful if not properly planned. However, instead of seeing it as an obstacle, it should be understood as an opportunity to audit and clean the dependency tree, something that every organization should do on a regular basis.
The question that immediately arises is: how to deal with this migration without stopping production? The first thing experts recommend is to update to npm 11.16.0 (where the changes already appear as warnings) to assess the actual scope of the block. Then run the npm approve-scripts --allow-scripts-pending command to list all packages that have pending scripts. This list is usually more extensive than expected, including native modules, telemetry packages, and binary downloads of transitive dependencies. The next step is to review each of those scripts, approve the legitimate ones, and deny the suspicious ones. The resulting allowlist must be versioned in code control, becoming a reviewable artifact during pull requests. This is where many companies find value in having a technological ally. Q2BSTUDIO's cybersecurity services include dependency audits and risk analysis in software supply chains, helping teams identify which scripts are truly necessary and which can be removed or replaced with more secure alternatives.
Beyond installation scripts, npm 12 also blocks implicit builds of node-and prepare scripts from local dependencies. This especially affects native packages that need to be compiled at installation time. The solution is to approve those packages in the allowlist or, better yet, migrate to pre-compiled binaries. For teams managing multiple projects, the key is to centralize the approval policy using tools such as the overrides field or shared configurations. In this sense, organizations that have already adopted an internal developer platform (IDP) approach have an advantage, as they can define and distribute security rules consistently.
The change in Git and remote dependencies deserves a separate reflection. By blocking by default the resolution of URLs such as https:// or Git references, npm 12 shuts down a path of code execution that could bypass --ignore-scripts using a malicious .npmrc file in the dependency's repository. This means that if any project uses forks not published in the official registry, or tarballs hosted in S3 buckets, now is the time to migrate them to the npm registry (public or private) or, at least, explicitly pass the --allow-git and --allow-remote flags. However, as security analysts point out, maintaining external dependencies without going through the registry is a bad practice that should be corrected definitively. Here, companies that already use AWS and Azure cloud services to host their own private npm registries have a more robust and controlled infrastructure, reducing the attack surface.
One of the aspects that most concerns technical managers is the impact on continuous integration (CI) pipelines. If the pipeline doesn't have a fixed npm version, the simple fact that npm 12 has been tagged as latest will cause the next run to automatically pick it up, breaking builds unexpectedly. That's why it's critical to clamp the npm version into every project, whether it's using environment variables, Docker images, or initialization scripts. In environments with multiple teams or clients, as is often the case in technology consultancies, the recommendation is even stricter: each project should have its own configuration file and not inherit a global version of npm. Q2BSTUDIO, with its expertise in custom software development, helps companies design robust pipelines that include these version controls and security policies, avoiding unpleasant surprises during deployments.
But security doesn't end with installation scripts. NPM 12 also initiates a deprecation cadence of granular access tokens that bypass two-factor authentication (2FA). In August 2026, these tokens will lose the ability to perform sensitive actions such as managing packages or team members; and in January 2027, they will lose the ability to publish directly. For organizations that rely on long-lived tokenized automations, this is an unavoidable timeframe to migrate to OIDC (OpenID Connect) trusted publishing or human-approved tiered publishing. Enterprise AI can make it easier to detect outdated or misconfigured tokens, but the final decision to migrate infrastructure rests with platform teams. In this context, having a technology partner that offers both consulting and implementation is a competitive advantage.
From a broader perspective, this npm movement reflects an unstoppable trend in the software industry: security should be built in from the start, not a patch later. The decision to block default installation scripts is comparable to that made by other package managers such as pnpm, which already disabled default scripts. Development teams should incorporate dependency review as part of the daily workflow, not as a one-time task after an incident. Tools such as Power BI or business intelligence services can help visualize the health of an organization's dependency ecosystem, showing metrics such as the number of approved, denied, or pending scripts, and alerting of packages that have gone unreviewed for a long time. Business intelligence applied to software security is an emerging area that many companies are starting to exploit.
Another point that deserves attention is that of AI agents and their role in automating code review tasks. While an AI agent can quickly examine the contents of an installation script and point out suspicious patterns, the final decision to approve it should be human, based on the context of the project and the maintainer's reputation. Enterprise AI is evolving to integrate into CI/CD pipelines, offering static and dynamic dependency analysis, but always under supervision. Q2BSTUDIO incorporates these capabilities into its bespoke application solutions, combining artificial intelligence with the expertise of senior engineers to deliver a balanced approach between automation and control.
In short, the arrival of npm 12 is not a simple version change, but a milestone in the maturity of security in the Node.js ecosystem. It requires teams to take a planned action: audit, approve, version, and migrate tokens. Those organizations that have the support of specialists like Q2BSTUDIO will be able to make this transition smoothly, taking the opportunity to strengthen their development practices and reduce technical debt in security. The investment in an orderly migration is much less than the cost of a security breach that requires rotating credentials and reviewing the entire dependency history. The message is clear: the era of blind trust in installation scripts is over. Welcome to the new normal, where every line of code that runs during an installation must be explicitly authorized.
.jpg)
.jpg)
.jpg)