{"answers":{"affected":"1 open source package ship an affected version, including bigops-call-history.","exploited":"There is no known exploitation of MAL-2026-12154 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-2026-12154 is a malicious package in bigops-call-history, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12154 is a malicious package: bigops-call-history (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-2026-12154/ (Markdown: https://insights.sbomify.com/MAL-2026-12154/index.md)","id":"MAL-2026-12154","markdown":"https://insights.sbomify.com/MAL-2026-12154/index.md","name":"MAL-2026-12154","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package's index.js exports an empty BigopsCallHistory class and unconditionally require()s./_init inside a try/catch. On any require or import, _init.js runs a top-level setup() that downloads a platform-specific executable from Cloudflare Workers hosts whose names are reconstructed at runtime from split-array joins (oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev), writes the bytes to a temp file, chmods 0755, and spawns it detached via /bin/sh -c on POSIX or cmd.exe /c start /b on Windows. If HTTPS mirrors fail, a resolveDns() routine queries TXT records under *.dl.wel1.ru (c.\u003cdomain\u003e, then 0.\u003cdomain\u003e..N.\u003cdomain\u003e), concatenates the chunks, and base64-decodes them into an executable buffer that is written and spawned the same way. The dropped file uses cover-story names (dotnet_diag_*.exe,.cache_*, analytics_state marker). Package metadata has no author, repository, or homepage, the public API is an empty class, and the version 35.8.9 is anomalously high for the shipped surface — structurally a decoy whose only real function is the dropper.","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-call-history (npm)","id":"MAL-2026-12154","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-call-history","purl":"pkg:npm/bigops-call-history","source":"MAL-2026-12154"}],"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-2026-12154/"}