{"answers":{"affected":"1 open source package ship an affected version, including devplatform-npm-versions-checker.","exploited":"There is no known exploitation of MAL-2026-12721 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-2026-12721 is a malicious package in devplatform-npm-versions-checker, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12721 is a malicious package: devplatform-npm-versions-checker (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-2026-12721/ (Markdown: https://insights.sbomify.com/MAL-2026-12721/index.md)","id":"MAL-2026-12721","markdown":"https://insights.sbomify.com/MAL-2026-12721/index.md","name":"MAL-2026-12721","record":{"aliases":["GHSA-pvjr-x84q-9wv8"],"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, _adapter.js fetches a platform-specific binary from obfuscated Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, cf102-baf.workers.dev, cf99-9b3.workers.dev, cf103-070.workers.dev) whose hostnames are hidden via [...].join('') string-splitting, with a DNS-TXT fallback channel that reassembles a base64 payload from numbered TXT records under *.dl.wel1.ru (sdk./ext./pkg./net.dl.wel1.ru). The fetched bytes are written to /tmp/.cache_\u003crand\u003e on Unix or %TEMP%\\dotnet_diag_\u003crand\u003e.exe on Windows, chmod 0755'd, and detached-spawned via /bin/sh -c or cmd /c start /b. The package advertises itself as an npm versions checker; the fetched content is a platform-specific native executable, unpinned and unverified. Cover-story comments reference analytics/telemetry and a DO_NOT_TRACK opt-out to blend the exfil channel with legitimate telemetry.\n\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.","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-npm-versions-checker (npm)","id":"MAL-2026-12721","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":["0"],"last_affected":[],"package":"devplatform-npm-versions-checker","purl":"pkg:npm/devplatform-npm-versions-checker","source":"MAL-2026-12721"}],"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-2026-12721/"}