--- title: Massive ChainDrop npm supply-chain attack infects... description: A self-propagating worm called ChainDrop has compromised over 1,300 npm packages with a combined 2 billion monthly downloads, including popular libraries like... canonical: https://daily.dev/posts/massive-chaindrop-npm-supply-chain-attack-infects-hundreds-of-packages-uhzbslfdu twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Massive ChainDrop npm supply-chain attack infects hundreds of packages | daily.dev og:description: A self-propagating worm called ChainDrop has compromised over 1,300 npm packages with a combined 2 billion monthly downloads, including popular libraries like... og:url: https://daily.dev/posts/massive-chaindrop-npm-supply-chain-attack-infects-hundreds-of-packages-uhzbslfdu og:image: https://api.daily.dev/og/posts/UHzbSlFDu.png og:image:alt: Massive ChainDrop npm supply-chain attack infects hundreds of packages og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Massive ChainDrop npm supply-chain attack infects hundreds of packages **[BleepingComputer](https://daily.dev/sources/bleepingcomputer)** · 4 min read · 3 upvotes · 1 comments ## Summary A self-propagating worm called ChainDrop has compromised over 1,300 npm packages with a combined 2 billion monthly downloads, including popular libraries like Keyv and Cacheable. The attack began when a threat actor compromised the GitHub account of Keyv's maintainer, then spread to packages from major organizations. Infected packages contain a dropper (setup.mjs) that executes automatically on npm install, downloads the Bun runtime, and runs an infostealer (Math_Symbol.js) that collects and exfiltrates developer credentials, GitHub tokens, npm tokens, AWS credentials, Kubernetes secrets, HashiCorp Vault tokens, and more. Stolen data is encrypted and sent to a public GitHub repository. The worm self-propagates by using stolen npm tokens to infect packages from other maintainers. Affected systems should be treated as fully compromised, rebuilt from scratch, and all accessible tokens rotated immediately. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@devdavidt** · 1 upvotes > Here we go again ## Similar posts on daily.dev - [ChainDrop worm crawls into npm supply chain, evades standard defenses](https://daily.dev/posts/chaindrop-worm-crawls-into-npm-supply-chain-evades-standard-defenses-vobyse76t) · The Register · 2 upvotes · 0 comments - [New npm supply-chain attack self-spreads to steal auth tokens](https://daily.dev/posts/new-npm-supply-chain-attack-self-spreads-to-steal-auth-tokens-p3mykawe4) · BleepingComputer · 122 upvotes · 17 comments --- Tags: [#security](https://daily.dev/tags/security), [#cyber](https://daily.dev/tags/cyber), [#javascript](https://daily.dev/tags/javascript), [#malware](https://daily.dev/tags/malware), [#npm](https://daily.dev/tags/npm) [View this post on daily.dev](https://daily.dev/posts/massive-chaindrop-npm-supply-chain-attack-infects-hundreds-of-packages-uhzbslfdu) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Massive ChainDrop npm supply-chain attack infects hundreds of packages","url":"https://daily.dev/posts/massive-chaindrop-npm-supply-chain-attack-infects-hundreds-of-packages-uhzbslfdu","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/massive-chaindrop-npm-supply-chain-attack-infects-hundreds-of-packages-uhzbslfdu"},"datePublished":"2026-08-04T15:28:33.142Z","dateModified":"2026-08-04T15:53:01.970Z","description":"A self-propagating worm called ChainDrop has compromised over 1,300 npm packages with a combined 2 billion monthly downloads, including popular libraries like...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f4c097e4f805da830080b540b470ee11?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f4c097e4f805da830080b540b470ee11?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"BleepingComputer","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"BleepingComputer","logo":"https://media.daily.dev/image/upload/s--as8nJ3qy--/f_auto,q_auto/v1774959951/logos/bleepingcomputer?_a=BAMAMiWQ0","url":"https://daily.dev/sources/bleepingcomputer"},"commentCount":1,"discussionUrl":"https://daily.dev/posts/massive-chaindrop-npm-supply-chain-attack-infects-hundreds-of-packages-uhzbslfdu","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":1}],"keywords":"security,cyber,javascript,malware,npm","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"BleepingComputer","item":"https://daily.dev/sources/bleepingcomputer"},{"@type":"ListItem","position":3,"name":"Massive ChainDrop npm supply-chain attack infects hundreds of packages"}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/massive-chaindrop-npm-supply-chain-attack-infects-hundreds-of-packages-uhzbslfdu","comment":[{"@type":"Comment","text":"Here we go again","datePublished":"2026-08-09T17:38:04.404Z","url":"https://daily.dev/posts/UHzbSlFDu#c-vqsxf24Rt","author":{"@type":"Person","name":"DavidDev","url":"https://daily.dev/devdavidt","image":"https://media.daily.dev/image/upload/s--jxmKsIov--/f_auto/v1788950401/avatars/avatar_HK0Qdu9ttIpcoDHx7zrHk?_a=BAMAMicg0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}}]} ```