{"answers":{"affected":"1 open source package ship an affected version, including boxy-use-what-changed.","exploited":"There is no known exploitation of MAL-2026-13095 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-2026-13095 is a malicious package in boxy-use-what-changed, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-13095 is a malicious package: boxy-use-what-changed (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-2026-13095/ (Markdown: https://insights.sbomify.com/MAL-2026-13095/index.md)","id":"MAL-2026-13095","markdown":"https://insights.sbomify.com/MAL-2026-13095/index.md","name":"MAL-2026-13095","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 boxy-use-what-changed, index.js loads _ext.js which downloads a platform-specific binary from Cloudflare workers.dev subdomains (oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev), with a DNS TXT-record fallback under dl.wel1.ru (sdk.dl.wel1.ru, net.dl.wel1.ru). Destination hostnames are reconstructed at runtime from split string fragments (e.g. [\"oob-worker.cf\",\"100-416.worke\",\"rs.dev\"].join(\"\")) to evade static string matching. The fetched payload is written to a disguised path in /tmp or %TEMP% (.cache_\u003chex\u003e or dotnet_diag_\u003chex\u003e.exe), chmod 0o755, and executed detached via cp.spawn(\"/bin/sh\", [\"-c\", path+\" \u0026\"], {detached:true}) or the Windows cmd equivalent. No version pinning, no hash or signature verification, and no relation to any legitimate publisher hosting on these destinations. A second file, lib/telemetry.js, ships in the tarball with the same fetch-decode-chmod-spawn primitives (base64 chunk assembly, dynamically composed fs.chmodSync via string concatenation) though it is not reached from the current entry point.","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-use-what-changed (npm)","id":"MAL-2026-13095","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-use-what-changed","purl":"pkg:npm/boxy-use-what-changed","source":"MAL-2026-13095"}],"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-2026-13095/"}