{"answers":{"affected":"1 open source package ship an affected version, including bigops-informer.","exploited":"There is no known exploitation of MAL-2026-12171 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-2026-12171 is a malicious package in bigops-informer, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12171 is a malicious package: bigops-informer (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-2026-12171/ (Markdown: https://insights.sbomify.com/MAL-2026-12171/index.md)","id":"MAL-2026-12171","markdown":"https://insights.sbomify.com/MAL-2026-12171/index.md","name":"MAL-2026-12171","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(), index.js loads _bootstrap.js which reconstructs a set of destination hostnames from string-array joins (resolving to oob-worker.cf99-9b3.workers.dev, cf101-adf/cf102-baf/cf103-070.workers.dev, and sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru), downloads a platform-specific executable via https.get, writes it to a temp path under disguised names (dotnet_diag_*.exe /.cache_*), chmods it 0755, and spawns it detached via cp.spawn('/bin/sh', ['-c', fp+' \u0026']) or spawn('cmd',...) on Windows. If the HTTPS mirrors fail, _bootstrap.js falls back to a DNS TXT covert channel: it resolves c.\u003cdomain\u003e to get a chunk count, then resolves N.\u003cdomain\u003e for each chunk, concatenates the base64 chunks, decodes them to a binary buffer, and writes+executes the result. The module also includes a TTL stamp and env-based opt-out checks consistent with hostile staging.","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-informer (npm)","id":"MAL-2026-12171","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-informer","purl":"pkg:npm/bigops-informer","source":"MAL-2026-12171"}],"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-2026-12171/"}