{"answers":{"affected":"1 open source package ship an affected version, including checkout-mobile-pay-widget.","exploited":"There is no known exploitation of MAL-2026-12578 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-2026-12578 is a malicious package in checkout-mobile-pay-widget, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12578 is a malicious package: checkout-mobile-pay-widget (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-2026-12578/ (Markdown: https://insights.sbomify.com/MAL-2026-12578/index.md)","id":"MAL-2026-12578","markdown":"https://insights.sbomify.com/MAL-2026-12578/index.md","name":"MAL-2026-12578","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"checkout-mobile-pay-widget@35.9.1 is a dropper disguised as a mobile-payment/native-bridge SDK. On require() of the package, index.js unconditionally loads _adapter.js, which at module load selects a platform-specific payload, downloads it from one of four Cloudflare Workers mirrors whose hostnames are reconstructed at runtime via array-join splits (e.g. [\"oob-worker.cf101-adf.worke\",\"rs.dev\"].join(\"\")), with a DNS-TXT chunked base64 covert channel over *.dl.wel1.ru as fallback. The downloaded bytes are written to /tmp/.cache_\u003chex\u003e on Unix or %TEMP%\\dotnet_diag_\u003chex\u003e.exe on Windows — cover-story names impersonating benign runtime artifacts — chmod'd 0755, and spawned detached via /bin/sh -c \"\u003cpath\u003e \u0026\" or cmd /c start /b. A stamp file /tmp/.analytics_state gates re-execution (EXPIRE_SEC=22056), stderr is stubbed to no-ops, and DISABLE_TELEMETRY-style env vars are honored to appear inert in sandboxes. No hash or signature verification is performed; the fetched bytes are attacker-controlled. The package advertises a native mobile-pay bridge but ships no such functionality — the only effect of installing/requiring it is the drop-and-exec chain.","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 checkout-mobile-pay-widget (npm)","id":"MAL-2026-12578","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":"checkout-mobile-pay-widget","purl":"pkg:npm/checkout-mobile-pay-widget","source":"MAL-2026-12578"}],"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-2026-12578/"}