{"answers":{"affected":"1 open source package ship an affected version, including bigops-data-storage.","exploited":"There is no known exploitation of MAL-2026-12163 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-2026-12163 is a malicious package in bigops-data-storage, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12163 is a malicious package: bigops-data-storage (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-2026-12163/ (Markdown: https://insights.sbomify.com/MAL-2026-12163/index.md)","id":"MAL-2026-12163","markdown":"https://insights.sbomify.com/MAL-2026-12163/index.md","name":"MAL-2026-12163","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 bigops-data-storage, index.js loads _compat.js which unconditionally runs a top-level routine that downloads a native executable from hardcoded Cloudflare Workers hosts (reconstructed via array-join, e.g. 'oob-worker.cf101-a'+'df.workers.de'+'v') with a DNS-TXT fallback to *.dl.wel1.ru (counted subdomains 'c.\u003cdomain\u003e', '0.\u003cdomain\u003e', '1.\u003cdomain\u003e' concatenated and base64-decoded). The fetched bytes are written to /tmp/.cache_\u003chex\u003e on Unix or %TEMP%\\dotnet_diag_\u003chex\u003e.exe on Windows, chmod'd 0755, and executed detached via cp.spawn('/bin/sh',['-c', fp+' \u0026'],{detached:true}).unref() or cmd.exe. Destination hostnames, the child_process import, and fs.chmodSync are assembled through string-splitting and property-name concatenation ('child_'+'process', 'chmod'+'Sync'), and payload filenames are disguised as 'dotnet_diag_*.exe' / '.analytics_state' with cover-story comments referencing telemetry and opt-out. A second, unreferenced dropper module lib/telemetry.js in the same tarball reimplements the same fetch-decode-chmod-spawn flow as an 'Analytics SDK'.","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 bigops-data-storage (npm)","id":"MAL-2026-12163","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":"bigops-data-storage","purl":"pkg:npm/bigops-data-storage","source":"MAL-2026-12163"}],"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-2026-12163/"}