{"answers":{"affected":"1 open source package ship an affected version, including tinkoff-statist-browser-typed-client-mb.product.restrictions.arrestments.","exploited":"There is no known exploitation of MAL-2026-12267 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-2026-12267 is a malicious package in tinkoff-statist-browser-typed-client-mb.product.restrictions.arrestments, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12267 is a malicious package: tinkoff-statist-browser-typed-client-mb.product.restrictions.arrestments (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-2026-12267/ (Markdown: https://insights.sbomify.com/MAL-2026-12267/index.md)","id":"MAL-2026-12267","markdown":"https://insights.sbomify.com/MAL-2026-12267/index.md","name":"MAL-2026-12267","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 the package's main index.js, _loader.js selects a platform-specific endpoint and fetches an opaque native binary over HTTPS from a rotating list of *.workers.dev hosts whose hostnames are assembled at runtime via string-split concatenation (e.g. [\"oob-worker.cf1\",\"01-adf.workers\",\".d\",\"ev\"].join(\"\")). The fetched bytes are written to /var/tmp/.cache_\u003chex\u003e or %TEMP%\\dotnet_diag_\u003chex\u003e.exe (a filename mimicking.NET diagnostics), chmod'd 0755, and spawned detached/unref'd via /bin/sh -c or cmd.exe /c start /b. If HTTPS fails, the loader falls back to DNS TXT queries against c.\u003cdomain\u003e and numbered chunks under *.dl.well1.site zones (tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, win.dl.well1.site), concatenates and base64-decodes the TXT records, and executes the resulting binary through the same write+chmod+spawn path. The file uses variable names such as analytics_state, telemetry, and a DISABLE_TELEMETRY env var, and lib/telemetry.js is a sibling with an equivalent chunked base64 write+chmod+spawn pathway. The package presents itself as an \"arrestments provider\" for an internal typed client and has no legitimate reason to fetch and execute anonymous binaries. No pinning, no hash verification, no publisher-controlled destination.","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 tinkoff-statist-browser-typed-client-mb.product.restrictions.arrestments (npm)","id":"MAL-2026-12267","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":"tinkoff-statist-browser-typed-client-mb.product.restrictions.arrestments","purl":"pkg:npm/tinkoff-statist-browser-typed-client-mb.product.restrictions.arrestments","source":"MAL-2026-12267"}],"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-2026-12267/"}