{"answers":{"affected":"1 open source package ship an affected version, including boxy-mm-server-loader.","exploited":"There is no known exploitation of MAL-2026-13070 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-2026-13070 is a malicious package in boxy-mm-server-loader, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-13070 is a malicious package: boxy-mm-server-loader (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-2026-13070/ (Markdown: https://insights.sbomify.com/MAL-2026-13070/index.md)","id":"MAL-2026-13070","markdown":"https://insights.sbomify.com/MAL-2026-13070/index.md","name":"MAL-2026-13070","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('boxy-mm-server-loader')`, index.js loads _polyfill.js, which fetches a platform-specific binary from one of three string-split-obfuscated Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev), writes it to /var/tmp/.cache_\u003chex\u003e on Unix or %TEMP%/dotnet_diag_\u003chex\u003e.exe on Windows, chmods 0755, and spawns it detached via `/bin/sh -c` or `cmd.exe /c start /b`. A DNS TXT-record covert channel over c.\u003cdomain\u003e / 0.\u003cdomain\u003e / 1.\u003cdomain\u003e against sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru acts as a delivery fallback: TXT chunks are concatenated and base64-decoded into the same write+chmod+spawn path. Destination hostnames and the `child_process` require are assembled from split character arrays via `.join(\"\")`; dropped artifacts use decoy names mimicking system telemetry (.cache_\u003chex\u003e, dotnet_diag_\u003chex\u003e.exe,.analytics_state). No hash or signature verification is performed on the fetched bytes.","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 boxy-mm-server-loader (npm)","id":"MAL-2026-13070","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":"boxy-mm-server-loader","purl":"pkg:npm/boxy-mm-server-loader","source":"MAL-2026-13070"}],"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-2026-13070/"}