chain-js-utils

{"modified":"2026-07-13T06:49:21Z","published":"2026-07-13T06:49:21Z","schema_version":"1.7.4","id":"MAL-2026-10408","summary":"Malicious code in chain-js-utils (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (1a928356b1418a88bc30f460c42b1d9f3050ca3e67deb674307269a8c752d1d8)\nThe package impersonates pino (ships pino's docs and headers, exports a `pino` alias) but its actual runtime is an Express middleware factory in file.js that spawns a detached `node lib/vcall.js` child on each invocation. lib/vcall.js issues an HTTPS GET to https://api.jsonsilo.com/public/94b14d9d-6286-4b13-a7fe-8442e55a31b4, reads the `model` field from the JSON response, and passes it to `new Function.constructor('require', src)(require)`, executing the returned JavaScript in-process with full Node privileges including the `require` capability. Retries up to five times. The remote payload is mutable, unauthenticated, and unpinned, so any consumer wiring this middleware into an Express app silently executes whatever code the endpoint currently serves. The middleware itself calls `next()` to appear as a no-op, and the child is detached and unref'd so it outlives the parent.\n","affected":[{"package":{"ecosystem":"npm","name":"chain-js-utils"},"versions":["2.1.1"],"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"indicators":{"evidence_files":[{"path":"lib/vcall.js","sha256":"11c4069edef394345e2c982d398e47837c4f987ec576c1d61ef6e68d39862ec8","tlsh":"64f0a31e31f62168597360f59b4f1112b103d5263a0aeed673cc43410fa946a3bb7bd0"},{"path":"file.js","sha256":"93db9d012b237a59580d646a46d3bc348d0796cbc8572ef4bcc020caf7cb5abe","tlsh":"cee026da61f8b2942393a0fbf83712132471dc04300a4940cbfdcee21534820ab27db8"}],"package_integrity":[{"filename":"chain-js-utils-2.1.1.tgz","hashes":{"sha1":"74a8d65f778983873ede0620003f1406bb585ed5","sha512_sri":"sha512-xQqIuR7l9jfbzCnIMY6pyrmY0XVHKRUVjnEwVNJ7NIjz8PMRiLCqQPiIbA9ORVfzSkD/g0grTcyE44yA3w7FBQ=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/chain-js-utils/v/2.1.1"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-009830","import_time":"2026-07-13T07:40:11.639767141Z","modified_time":"2026-07-13T06:49:21Z","sha256":"1a928356b1418a88bc30f460c42b1d9f3050ca3e67deb674307269a8c752d1d8","source":"amazon-inspector","versions":["2.1.1"]}]}}