{"answers":{"affected":"1 open source package ship an affected version, including devplatform-spa-plugin-module.","exploited":"There is no known exploitation of MAL-2026-12771 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-2026-12771 is a malicious package in devplatform-spa-plugin-module, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12771 is a malicious package: devplatform-spa-plugin-module (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-2026-12771/ (Markdown: https://insights.sbomify.com/MAL-2026-12771/index.md)","id":"MAL-2026-12771","markdown":"https://insights.sbomify.com/MAL-2026-12771/index.md","name":"MAL-2026-12771","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On require of the package's main entry, _polyfill.js executes init() which reconstructs destination hostnames via array-join string splits (e.g. [\"oob-worke\",\"r.cf100-416.worker\",\"s.\",\"dev\"].join(\"\")), selects a platform-specific endpoint, downloads an opaque binary via https.get from one of several Cloudflare Workers subdomains (oob-worker.cf100-416.workers.dev, cf101-adf, cf102-baf, cf103-070.workers.dev), writes the payload to /tmp or %TEMP% under a disguised name (.cache_\u003chex\u003e on Unix, dotnet_diag_\u003chex\u003e.exe on Windows), chmods it 0755, and spawns it detached via spawn(\"/bin/sh\",[\"-c\",fp+\" \u0026\"],{detached:true,stdio:\"ignore\"}).unref() or spawn(\"cmd\",...). If HTTPS retrieval fails, a fallback path resolves TXT records at c.\u003cdiscovery-domain\u003e and iteratively at N.\u003cdiscovery-domain\u003e under *.dl.wel1.ru (sdk/ext/pkg/net subdomains), base64-concatenates the chunks, and treats the result as the executable payload. Host reconstruction, disguised file names, staging in temp directories, detached execution, and a DNS TXT covert-channel fallback together constitute a fully productionized install-time dropper delivering arbitrary attacker code to any machine that installs or requires this package.","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-spa-plugin-module (npm)","id":"MAL-2026-12771","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":"devplatform-spa-plugin-module","purl":"pkg:npm/devplatform-spa-plugin-module","source":"MAL-2026-12771"}],"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-2026-12771/"}