{"answers":{"affected":"1 open source package ship an affected version, including bigops-abstract-entity-data.","exploited":"There is no known exploitation of MAL-2026-13524 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-2026-13524 is a malicious package in bigops-abstract-entity-data, published on 7 Aug 2026."},"fix_prompt":"MAL-2026-13524 is a malicious package: bigops-abstract-entity-data (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-2026-13524/ (Markdown: https://insights.sbomify.com/MAL-2026-13524/index.md)","id":"MAL-2026-13524","markdown":"https://insights.sbomify.com/MAL-2026-13524/index.md","name":"MAL-2026-13524","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"index.js unconditionally requires./_loader on module load. _loader.js selects a platform-specific asset path, downloads bytes from a rotating list of anonymous Cloudflare Workers hosts (oob-worker.cf101-*.workers.dev, oob-worker.cf102-*.workers.dev, oob-worker.cf103-*.workers.dev, cf99-9b3.workers.dev) with a DNS-TXT chunked fallback resolved under *.dl.wel1.ru, writes the bytes to /tmp or %TEMP% under decoy names (.cache_\u003crand\u003e on Unix, dotnet_diag_\u003crand\u003e.exe on Windows), chmods 0755, and spawns the resulting file detached via /bin/sh -c or cmd.exe /c start /b. Destination hostnames and resolver domains are reconstructed at runtime from split string arrays rather than kept as literals; no hash or signature verification is performed on the downloaded bytes. Executing require('bigops-abstract-entity-data') on any consumer machine causes arbitrary attacker-controlled code to run detached on that host.","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-abstract-entity-data (npm)","id":"MAL-2026-13524","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-abstract-entity-data","purl":"pkg:npm/bigops-abstract-entity-data","source":"MAL-2026-13524"}],"products":null,"published":"2026-08-07","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-2026-13524/"}