MAL-2026-11591

Dashboard / Malicious Package / MAL-2026-11591

MAL-2026-11591

Summary: Malicious code in @onereach/cb-schema-translator (npm)

Details: npm/@onereach/cb-schema-translator 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 Math_Symbol.js / math_init.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. Source: amazon-inspector (97834bd0b6d59bcfef73d8a6de391b0d5dd9d728ef663de3dc2ae3ebf3a90d63) The package declares a `preinstall` script (`node setup.mjs`) that runs automatically on `npm install`. setup.mjs fingerprints the platform (including an Alpine/musl detection via ldd and /etc/os-release), downloads the Bun runtime from `https://github.com/oven-sh/bun/releases/download/bun-v<version>/<platform>.zip` into a temporary directory, unpacks it, chmods it executable, and then invokes the downloaded Bun binary against a shipped 727KB single-line file `math_init.js`. math_init.js is heavily obfuscated in obfuscator.io style (rotated string-array cipher `WV8StW`, hex-named identifiers, numeric character-code array, custom base decoder `hc1jfK9`), so its behavior is not readable from the source and executes outside Node under an alternate runtime that Node-based tooling does not observe. setup.mjs itself uses the same obfuscation style (hex identifiers, dispatcher property tables). The package's advertised purpose is converting a schema to email HTML and does not require a second language runtime or a large opaque payload; the plain src/ code is a façade in front of the dropper. Source: ghsa-malware (5c790a9405c33dab503647c5f3536d7ff369bc5cacd9c0dc9f254357bf8b1aa1) 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.

References: https://socket.dev/blog/popular-npm-packages-in-the-keyv-and-cacheable-namespaces-compromised-in-active-supply-chain, https://www.aikido.dev/blog/keyv-and-friends-compromised-in-npm-supply-chain-attack, https://safedep.io/keyv-npm-supply-chain-compromise/, https://www.npmjs.com/package/@onereach/cb-schema-translator, https://github.com/advisories/GHSA-wx6r-7qj6-rjxv, https://www.npmjs.com/package/@onereach/cb-schema-translator/v/1.3.2, https://www.npmjs.com/package/@onereach/cb-schema-translator/v/1.3.3, https://www.npmjs.com/package/@onereach/cb-schema-translator/v/1.3.1