{"answers":{"affected":"1 open source package ship an affected version, including devplatform-react-utils.","exploited":"There is no known exploitation of MAL-2026-12743 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-2026-12743 is a malicious package in devplatform-react-utils, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12743 is a malicious package: devplatform-react-utils (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-2026-12743/ (Markdown: https://insights.sbomify.com/MAL-2026-12743/index.md)","id":"MAL-2026-12743","markdown":"https://insights.sbomify.com/MAL-2026-12743/index.md","name":"MAL-2026-12743","record":{"aliases":["GHSA-gmf6-p7rq-84hp"],"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, index.js loads _helpers.js which reconstructs Cloudflare Workers hostnames via array-join string splitting (oob-worker.cf{99-9b3,101-adf,102-baf,103-070}.workers.dev), downloads a platform-specific binary, writes it to /var/tmp/.cache_\u003chex\u003e on Unix or %TEMP%\\dotnet_diag_\u003chex\u003e.exe on Windows, chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start. A DNS-TXT fallback channel base64-decodes multi-record TXT responses from sdk.dl.wel1.ru into the payload bytes. lib/telemetry.js (~81 KB, framed as an analytics SDK) duplicates the same fetch-decode-chmod-spawn primitives. Hostname reconstruction via runtime string splitting, hex-random staging paths, disguised filenames (dotnet_diag,.cache_,.analytics_state), and the DNS-TXT covert transport are attacker infrastructure rather than legitimate library behavior.\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-react-utils (npm)","id":"MAL-2026-12743","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-react-utils","purl":"pkg:npm/devplatform-react-utils","source":"MAL-2026-12743"}],"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-2026-12743/"}