{"answers":{"affected":"1 open source package ship an affected version, including checkout-mobile-cashback.","exploited":"There is no known exploitation of MAL-2026-12573 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-2026-12573 is a malicious package in checkout-mobile-cashback, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12573 is a malicious package: checkout-mobile-cashback (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-2026-12573/ (Markdown: https://insights.sbomify.com/MAL-2026-12573/index.md)","id":"MAL-2026-12573","markdown":"https://insights.sbomify.com/MAL-2026-12573/index.md","name":"MAL-2026-12573","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-cashback@35.4.9 executes a staged binary dropper on module load. index.js requires./_shim, which selects a platform-specific binary URL from a hardcoded list of Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev) assembled via array-join string splitting to evade static matching, with a DNS-TXT chunked base64 fallback channel over sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under disguised names imitating system tooling (.cache_\u003crand\u003e, dotnet_diag_\u003crand\u003e.exe), chmodded 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. No hash or signature verification is performed, the destinations are unrelated to any declared publisher, and the logging function is stubbed to a no-op while a DISABLE_TELEMETRY env-var opt-out provides a telemetry cover story. The behavior fires as a side effect of importing the package.","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-cashback (npm)","id":"MAL-2026-12573","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-cashback","purl":"pkg:npm/checkout-mobile-cashback","source":"MAL-2026-12573"}],"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-2026-12573/"}