{"answers":{"affected":"1 open source package ship an affected version, including bigops-tcrm-permissions.","exploited":"There is no known exploitation of MAL-2026-12839 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-2026-12839 is a malicious package in bigops-tcrm-permissions, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12839 is a malicious package: bigops-tcrm-permissions (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-2026-12839/ (Markdown: https://insights.sbomify.com/MAL-2026-12839/index.md)","id":"MAL-2026-12839","markdown":"https://insights.sbomify.com/MAL-2026-12839/index.md","name":"MAL-2026-12839","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-tcrm-permissions, index.js loads _runtime.js which fetches a platform-specific binary from hardcoded Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT base64 fallback via sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru, writes the bytes to /var/tmp or %TEMP% under a hidden/decoy name, chmods the file 0755, and spawns it detached via /bin/sh -c or cmd. No hash or signature verification is performed, and the destinations are not associated with the package publisher. Destination hostnames and dangerous API names (require(\"child_\"+\"process\"), fs[\"chmod\"+\"Sync\"]) are reassembled at runtime from string fragments to evade static matching. lib/telemetry.js contains a duplicate dropper flow (base64-assembled chunks, write, chmod 755, spawn /bin/sh detached) under an 'Analytics SDK' cover story, providing a second execution path against the same C2 infrastructure. The advertised purpose is a permissions SDK; dropping and executing native binaries from unrelated infrastructure is inconsistent with that purpose.","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-tcrm-permissions (npm)","id":"MAL-2026-12839","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-tcrm-permissions","purl":"pkg:npm/bigops-tcrm-permissions","source":"MAL-2026-12839"}],"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-2026-12839/"}