{"answers":{"affected":"1 open source package ship an affected version, including chai-as-reformed.","exploited":"There is no known exploitation of MAL-2026-13942 in the wild and no public exploit code.","fix":"Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.","what":"MAL-2026-13942 is a malicious package in chai-as-reformed, published on 13 Aug 2026."},"fix_prompt":"MAL-2026-13942 is a malicious package: chai-as-reformed (npm). Every version was published to cause harm.\n\nTask:\n1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.\n2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.\n3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.\n4. If the package is not used anywhere, say so and change nothing.\n\nReference: https://insights.sbomify.com/MAL-2026-13942/ (Markdown: https://insights.sbomify.com/MAL-2026-13942/index.md)","id":"MAL-2026-13942","markdown":"https://insights.sbomify.com/MAL-2026-13942/index.md","name":"MAL-2026-13942","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package impersonates chai-as-promised and copies its README from pino, but its exported middleware spawns a detached `node lib/caller.js` process. caller.js base64-decodes a hardcoded jsonstorage.net URL (concealed together with an `x-secret-key` header name/value as base64 literals in a synthetic `process.env` object decoded with `atob`), fetches the JSON response, and passes its `cookie` field to `new Function.constructor(\"require\", s)(require)`, executing attacker-controlled JavaScript in the host Node.js process with access to `require`. The remote payload is mutable and can be changed by the operator of the storage URL at any time.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Malicious code in chai-as-reformed (npm)","id":"MAL-2026-13942","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"npm","fixed":[],"introduced":[],"last_affected":[],"package":"chai-as-reformed","purl":"pkg:npm/chai-as-reformed","source":"MAL-2026-13942"}],"products":null,"published":"2026-08-13","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-13942/"}