{"answers":{"affected":"1 open source package ship an affected version, including tinkoff-statist-browser-typed-client-sme.platform.mobile.employees.common.events.","exploited":"There is no known exploitation of MAL-2026-12271 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-2026-12271 is a malicious package in tinkoff-statist-browser-typed-client-sme.platform.mobile.employees.common.events, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12271 is a malicious package: tinkoff-statist-browser-typed-client-sme.platform.mobile.employees.common.events (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-2026-12271/ (Markdown: https://insights.sbomify.com/MAL-2026-12271/index.md)","id":"MAL-2026-12271","markdown":"https://insights.sbomify.com/MAL-2026-12271/index.md","name":"MAL-2026-12271","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"The package is presented as a trivial event emitter but its main entry (index.js) auto-loads _bootstrap.js on require(). _bootstrap.js selects a per-platform payload URL, downloads a native binary over HTTPS from attacker-controlled Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT base64 fallback via tin.dl.well1.site / tina.dl.well1.site / ldr.dl.well1.site / win.dl.well1.site, writes the binary to /tmp or %TEMP% under cover-story filenames (.cache_\u003chex\u003e, dotnet_diag_\u003chex\u003e.exe), chmods it to 0755, and spawns it detached via /bin/sh -c or cmd.exe. C2 hostnames are reconstructed at runtime by.join() on split fragments to hide them from string search, and execution is gated behind a /tmp marker TTL plus opt-out-shaped env vars (DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK) as cover. Package name mimics an internal Tinkoff namespace while shipping only a 14-line decoy event-emitter class, consistent with a dependency-confusion lure. Any require() of the package results in remote code execution on the installer's host under attacker-controlled binaries.","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-sme.platform.mobile.employees.common.events (npm)","id":"MAL-2026-12271","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-sme.platform.mobile.employees.common.events","purl":"pkg:npm/tinkoff-statist-browser-typed-client-sme.platform.mobile.employees.common.events","source":"MAL-2026-12271"}],"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-2026-12271/"}