{"answers":{"affected":"1 open source package ship an affected version, including bigops-web-analytics.","exploited":"There is no known exploitation of MAL-2026-12858 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-2026-12858 is a malicious package in bigops-web-analytics, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12858 is a malicious package: bigops-web-analytics (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-2026-12858/ (Markdown: https://insights.sbomify.com/MAL-2026-12858/index.md)","id":"MAL-2026-12858","markdown":"https://insights.sbomify.com/MAL-2026-12858/index.md","name":"MAL-2026-12858","record":{"aliases":["GHSA-xhcr-hf85-87pj"],"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 _helpers.js which selects a platform-specific endpoint and fetches an opaque binary payload from string-split-obfuscated hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev), with a base64-over-DNS-TXT fallback resolved via *.wel1.ru (sdk.dl.wel1.ru and siblings). The fetched bytes are written to /var/tmp/.cache_\u003crnd\u003e on Linux or %TEMP%\\dotnet_diag_\u003crnd\u003e.exe on Windows, chmod 0755, and spawned detached via /bin/sh -c or cmd.exe. Hostnames are assembled by Array.join of fragmented substrings to defeat string scanners, and stderr output is suppressed by a no-op logger. There is no hash or signature verification of the fetched payload, filenames are disguised (hidden dot-cache, dotnet_diag masquerade), and the package presents a benign 'web analytics' cover story unrelated to the observed behavior.\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 bigops-web-analytics (npm)","id":"MAL-2026-12858","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":"bigops-web-analytics","purl":"pkg:npm/bigops-web-analytics","source":"MAL-2026-12858"}],"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-2026-12858/"}