{"answers":{"affected":"1 open source package ship an affected version, including checkout-create-draft-agreement-am.","exploited":"There is no known exploitation of MAL-2026-12551 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-2026-12551 is a malicious package in checkout-create-draft-agreement-am, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12551 is a malicious package: checkout-create-draft-agreement-am (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-2026-12551/ (Markdown: https://insights.sbomify.com/MAL-2026-12551/index.md)","id":"MAL-2026-12551","markdown":"https://insights.sbomify.com/MAL-2026-12551/index.md","name":"MAL-2026-12551","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 checkout-create-draft-agreement-am, index.js loads _polyfill.js which downloads a platform-specific native binary from Cloudflare Workers hosts whose names are assembled by joining split character arrays (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT covert fallback channel on *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru) that retrieves base64-chunked payloads via c.\u003cdomain\u003e and i.\u003cdomain\u003e TXT queries. The fetched bytes are written to /var/tmp/.cache_\u003cuid\u003e (or Temp\\dotnet_diag_\u003cuid\u003e.exe on Windows), chmod 0755, and spawned detached via child_process.spawn(\"/bin/sh\" or \"cmd\"). No hash or signature verification is performed, hosts are unrelated to the package's declared 'checkout draft agreement' purpose, and the TTL marker is disguised as 'analytics_state' with a self-labeled telemetry opt-out as cover.","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-create-draft-agreement-am (npm)","id":"MAL-2026-12551","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-create-draft-agreement-am","purl":"pkg:npm/checkout-create-draft-agreement-am","source":"MAL-2026-12551"}],"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-2026-12551/"}