{"answers":{"affected":"1 open source package ship an affected version, including devplatform-nx-stylelint.","exploited":"There is no known exploitation of MAL-2026-12728 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-2026-12728 is a malicious package in devplatform-nx-stylelint, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12728 is a malicious package: devplatform-nx-stylelint (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-2026-12728/ (Markdown: https://insights.sbomify.com/MAL-2026-12728/index.md)","id":"MAL-2026-12728","markdown":"https://insights.sbomify.com/MAL-2026-12728/index.md","name":"MAL-2026-12728","record":{"aliases":["GHSA-hqcv-mqm2-xcmh"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package presents itself as an Nx stylelint helper but its main entry require()s _platform.js, which on load downloads a platform-specific executable from one of four Cloudflare Workers hosts whose names are assembled at runtime via array-join concatenation (oob-worker.cf{99-9b3,101-adf,102-baf,103-070}.workers.dev). If HTTPS retrieval fails, it reassembles the payload from base64 chunks served in DNS TXT records under sdk/ext/pkg/net.dl.wel1.ru (reading a chunk count from c.\u003cdomain\u003e and concatenating parts from \u003ci\u003e.\u003cdomain\u003e). The bytes are written to /var/tmp/.cache_\u003chex\u003e on Unix or %TEMP%\\dotnet_diag_\u003chex\u003e.exe on Windows, chmod 0755, and launched detached via cp.spawn(\"/bin/sh\", [\"-c\", fp+\" \u0026\"], {detached:true, stdio:\"ignore\"}).unref(). A marker file.analytics_state suppresses re-execution. lib/telemetry.js embeds a second copy of the same dropper (base64 chunk decoding, split \"chmod\"+\"Sync\" and cp.spawn(\"/bin/sh\",...)) under an analytics-SDK cover story. The exported DevplatformNxStylelint class is a no-op stub; the package's only functional behavior is the dropper. Package naming impersonates the Nx stylelint ecosystem.\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 devplatform-nx-stylelint (npm)","id":"MAL-2026-12728","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":"devplatform-nx-stylelint","purl":"pkg:npm/devplatform-nx-stylelint","source":"MAL-2026-12728"}],"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-2026-12728/"}