On January 8, 2022, the maintainer of colors.js — a terminal-styling package with more than 20 million weekly downloads and 18,962 dependent packages — pushed version 1.4.1 containing an infinite loop that triggered once an internal counter reached 666, flooding any application that imported it with garbled "zalgo" text on startup. Three days earlier, on January 5, the same maintainer, known as Marak, had force-pushed a commit to faker.js that deleted the entire codebase and published an empty package as version 6.6.6, breaking roughly 2 million weekly downloads' worth of dependents overnight. Version 1.4.1 of colors.js alone was pulled 95,397 times before the ecosystem caught up and mitigated it. This wasn't a compromised credential or a nation-state supply chain implant — it was the original author, by his own account frustrated over years of unpaid maintenance work, deliberately breaking software he legally owned. The incident became a reference case for a risk category static scanners weren't built to catch: what happens when the trusted party itself turns hostile. This post walks through what happened, who it hit, and what actually would have stopped it.
What exactly did the colors.js sabotage do?
The colors.js sabotage shipped as version 1.4.1 (and a follow-up 1.4.44-liberty-2) with code that ran immediately on require() — no function call needed, no trigger condition beyond time. The payload maintained an internal counter and, once it hit 666, entered an infinite loop that printed corrupted Unicode ("zalgo") characters to the terminal indefinitely, effectively a self-inflicted denial-of-service baked into the package itself. Because colors.js sat as a transitive dependency in an enormous number of Node.js projects, the blast radius wasn't limited to direct consumers. Downstream packages hit included prompt (roughly 500,000 weekly downloads, itself maintained by the same author) and cli-table3 (roughly 7 million weekly downloads), and Amazon's own aws-cdk toolkit — pulling around 2 million weekly downloads at the time — briefly broke for developers who ran a build during the exposure window before the ecosystem responded.
What happened to faker.js, and why does the timing matter?
faker.js — a widely used library for generating fake test data — was hit first, on January 5, 2022, three days before colors.js. The maintainer force-pushed a commit that wiped the repository's source code entirely and published an empty package under the version number 6.6.6, then deleted the GitHub repository outright, cutting off any easy rollback path for consumers relying on GitHub as the source of truth rather than a pinned npm registry version. Faker.js had roughly 2 million weekly downloads at the time. The sequencing matters because it shows this wasn't an isolated slip on one package — it was a pattern, executed deliberately across two separate repositories the same person controlled, within the same week. That repetition is what pushed the incident from "one bad release" into the industry's now-standard reference point for maintainer-originated sabotage, sometimes called "protestware" because the stated motive was protest over unpaid labor rather than financial theft.
Why was one person able to affect millions of projects?
Because open source concentrates enormous reach in very few hands. The colors.js and faker.js maintainer was, by his own public statements at the time, responsible for around 170 npm packages — a number that illustrates how a handful of prolific, unpaid maintainers can sit underneath an enormous share of the JavaScript ecosystem's dependency graph. npm's trust model doesn't distinguish between "vetted, funded maintenance team" and "one volunteer with publish rights and no obligation to anyone." Once a package earns broad adoption, every downstream consumer inherits that maintainer's judgment, mental state, and incentives indefinitely, with no visibility into how concentrated or fragile that arrangement is. As Snyk's research on the incident documented, the practical fallout for consuming teams was immediate version pinning and dependency-lock scrutiny — reactive measures taken only after the damage had already shipped.
Could this have been detected before it reached production?
Some of it, yes — but only with tooling built to watch behavior, not just known-CVE lookups, since a maintainer publishing intentionally sabotaged code from their own account has no CVE, no leaked credential, and no typosquatted name to flag. The infinite-loop payload in colors.js 1.4.1 is a textbook case of what Safeguard's Eagle malware-classification model scores as "behavior divergence from prior versions" — new runtime behavior (in this case, code that ran unconditionally at import time and never terminated) that didn't exist in any earlier release of the same package. That signal doesn't require knowing the maintainer's intent; it only requires comparing what a new version actually does against its own history. Safeguard's Package Firewall complements that by evaluating every install-time fetch, including transitive ones, so a sabotaged version pulled in three dependency layers deep — exactly how most projects consumed colors.js — is checked before it ever reaches a build, not after a postmortem.
What should teams actually do differently?
Snyk's own guidance from the incident remains sound: pin dependency versions explicitly rather than trusting caret or tilde ranges to auto-upgrade, lock transitive dependencies through a lockfile that's actually committed and enforced in CI, and evaluate whether a heavily-relied-on utility like colors.js can be replaced with a better-resourced alternative such as chalk. Beyond that specific incident, teams should treat maintainer concentration as a first-class supply chain signal worth watching, the same way they'd watch for a stale CVE or an unmaintained package — recognizing plainly that neither Safeguard nor most of the industry has fully solved automated bus-factor or maintainer-count scoring today. Malware and behavioral detection catch the payload once it ships; they don't yet predict which maintainer is about to burn out. Combining install-time enforcement with basic dependency hygiene — pinning, lockfiles, and periodically auditing what a small number of accounts actually control across your tree — is the realistic defense available right now.