{"answers":{"affected":"1 open source package ship an affected version, including eslint-plugin-vitest-ts.","exploited":"There is no known exploitation of MAL-2026-12370 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-2026-12370 is a malicious package in eslint-plugin-vitest-ts, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12370 is a malicious package: eslint-plugin-vitest-ts (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-2026-12370/ (Markdown: https://insights.sbomify.com/MAL-2026-12370/index.md)","id":"MAL-2026-12370","markdown":"https://insights.sbomify.com/MAL-2026-12370/index.md","name":"MAL-2026-12370","record":{"aliases":["GHSA-pw3r-jw68-935v"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package declares itself as an ESLint plugin but ships copies of nodemailer's source layout along with an obfuscated install-time loader. package.json's postinstall hook runs `node lib/utils/index.js`, which spawns a detached child process executing lib/utils/smtp-connection/index.js. That file uses obfuscator.io-style string-array indirection (`_0x438c`, `_0x926305`, etc.) to hide a call that fetches JSON from https://api.jsonbin.io/v3/b/6a72aa2bda38895dfebb1302 and passes the returned `record.cookie` string to `new Function('require', \u003cfetched\u003e)(require)`. The fetched content is attacker-controlled and mutable, and it executes in-process with `require` injected, giving arbitrary code execution on any machine that runs `npm install` for this package. The name `eslint-plugin-vitest-ts` is unrelated to the shipped nodemailer-shaped source, indicating a lure/typosquat.\n\nAny 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.","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 eslint-plugin-vitest-ts (npm)","id":"MAL-2026-12370","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":["0"],"last_affected":[],"package":"eslint-plugin-vitest-ts","purl":"pkg:npm/eslint-plugin-vitest-ts","source":"MAL-2026-12370"}],"products":null,"published":"2026-08-05","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-2026-12370/"}