MAL-2026-11729

npm/@or-sdk/step-templates is affected by the large-scale, self-propagating npm supply-chain worm of 2026-08-04 (the "Shai-Hulud: Here We Go Again" wave) — the same campaign that began with the compromise of the keyv and cacheable maintainer account. The listed version(s) were trojanized and republished by the worm after it reached an npm publish token belonging to a maintainer in this namespace; the payload enumerates every package a stolen token controls and republishes each with the same hook, so many packages under this scope were poisoned in the same short window. Every poisoned release adds a preinstall hook ("preinstall": "node setup.mjs") that runs on a bare npm install, before any project code. setup.mjs downloads a standalone Bun runtime and runs a byte-identical, heavily obfuscated ~728 KB second-stage credential stealer (shipped as MathSymbol.js / mathinit.js). It harvests GitHub, npm, AWS, GCP, Azure, HashiCorp Vault and Kubernetes credentials plus generic secrets and private keys (TruffleHog-style sweep), reads CI/CD secrets and identifies build runners, then republishes further packages the stolen token can reach. Rather than a fixed command-and-control host, it exfiltrates stolen findings to attacker-created GitHub repositories (descriptions reading "Shai-Hulud: Here We Go Again") and over DNS. Treat any environment that installed an affected version (with install scripts enabled) as compromised: rotate and revoke all reachable credentials (npm and GitHub tokens, cloud keys, Vault/Kubernetes secrets, and CI org/repo secrets). Part of the August 2026 npm worm that poisoned 400+ packages across many organizations.

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (1c1fd5d83c238fbb94fea35d735ab3a7436e603f4760f5fd5c1de84048bb1475)

The package declares a preinstall script node setup.mjs that downloads the Bun runtime from GitHub releases into a temp directory, marks it executable, and uses it to invoke a 727 KB obfuscated sibling file math_init.js shipped in the tarball. math_init.js is a // @bun @bun-cjs bundle written as a single line using obfuscator.io-style identifier renaming, a rotating string-array decoder (shift routine plus alphabet-based decoder), and an oversize numeric/string dictionary; the file is not referenced from any of the package's advertised SDK entry points. The declared purpose of @or-sdk/step-templates is an SDK library, which does not require fetching an alternate JavaScript runtime at install time or running an opaque payload under it. The Bun invocation also intentionally evades Node-scoped runtime instrumentation. On Windows the archive is extracted via powershell -ExecutionPolicy Bypass -Command "Expand-Archive...". The alternate-runtime dropper of an obfuscated blob fires automatically on npm install.

Source: ghsa-malware (edb2bd01aea91652454d21e47a3a76f5656ea500e1144859142cb76d8ec1f6b8)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.