{"answers":{"affected":"1 open source package ship an affected version, including devplatform-po-transformer.","exploited":"There is no known exploitation of MAL-2026-12733 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-2026-12733 is a malicious package in devplatform-po-transformer, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12733 is a malicious package: devplatform-po-transformer (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-2026-12733/ (Markdown: https://insights.sbomify.com/MAL-2026-12733/index.md)","id":"MAL-2026-12733","markdown":"https://insights.sbomify.com/MAL-2026-12733/index.md","name":"MAL-2026-12733","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, _platform.js detects OS/arch and downloads an opaque binary from Cloudflare Workers hostnames assembled at runtime from split-string arrays (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS-TXT covert-channel fallback under *.dl.wel1.ru that reassembles base64 chunks from N.\u003cdomain\u003e TXT records. The fetched bytes are written to /tmp/.cache_\u003crand\u003e on Unix or %TEMP%\\dotnet_diag_\u003crand\u003e.exe on Windows under deceptive filenames, chmod 0755, and spawned detached and unref'd via /bin/sh -c or cmd.exe /c start /b so the child survives the Node parent. There is no hash or signature verification; the download hosts are unrelated to the package publisher; a TTL marker at /tmp/.analytics_state suppresses re-execution within ~21000s. The fetch-decode-execute chain fires on import of the package's main entry, giving the operator of the remote endpoints arbitrary persistent code execution on the installer's host.","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 devplatform-po-transformer (npm)","id":"MAL-2026-12733","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":"devplatform-po-transformer","purl":"pkg:npm/devplatform-po-transformer","source":"MAL-2026-12733"}],"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-2026-12733/"}