{"answers":{"affected":"1 open source package ship an affected version, including pfa-prettier-config.","exploited":"There is no known exploitation of MAL-2026-12407 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-2026-12407 is a malicious package in pfa-prettier-config, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12407 is a malicious package: pfa-prettier-config (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-2026-12407/ (Markdown: https://insights.sbomify.com/MAL-2026-12407/index.md)","id":"MAL-2026-12407","markdown":"https://insights.sbomify.com/MAL-2026-12407/index.md","name":"MAL-2026-12407","record":{"aliases":["GHSA-qmmm-73xw-c3f2"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package is published as 'pfa-prettier-config' with description 'environment config reader', but contains no Prettier configuration or config-reading code. index.js unconditionally requires./_platform on load. _platform.js selects a per-OS asset path, fetches bytes from one of four Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev) — with hostnames reassembled at runtime via string-concat (e.g. [\"oob-worker.cf\",\"102-baf.workers.dev\"].join(\"\")) — and falls back to a chunked DNS TXT download from tin.dl.well1.site. The fetched bytes are written to /var/tmp/.cache_\u003chex\u003e or %TEMP%/dotnet_diag_\u003chex\u003e.exe under cover names, chmod'd 0755, and spawned detached via cp.spawn('/bin/sh', ['-c', fp+' \u0026'], {detached:true}).unref() or spawn('cmd',...). A second dropper is shipped in lib/telemetry.js (~81KB, disguised as an 'Analytics SDK') containing the same primitives (base64 chunk decode, chmodSync 0755 on 'extensionPath', cp.spawn('/bin/sh', ['-c', filePath+' \u0026'])), with child_process required via the computed string require('child_'+'process'). Requiring or importing this package triggers download-and-execute of an attacker-hosted OS-specific binary.\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 pfa-prettier-config (npm)","id":"MAL-2026-12407","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":"pfa-prettier-config","purl":"pkg:npm/pfa-prettier-config","source":"MAL-2026-12407"}],"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-2026-12407/"}