OpenSSF/OSV advisory MAL-2026-13266 confirms this npm version as malicious. On require() of devplatform-table, index.js loads./_compat which selects a platform-specific payload path, downloads an executable from string-concatenation-obfuscated Cloudflare Workers hosts (reconstructed from fragments such as ["oob-worker.cf103-070.workers.d","ev"].join("")) with a DNS-TXT fallback via *.dl.wel1.ru, writes it to /tmp or %TEMP% under disguised names (.cache_<hex>, dotnet_diag_<hex>.exe), chmods...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in devplatform-table (npm)
Details
On require() of devplatform-table, index.js loads./_compat which selects a platform-specific payload path, downloads an executable from string-concatenation-obfuscated Cloudflare Workers hosts (reconstructed from fragments such as ["oob-worker.cf103-070.workers.d","ev"].join("")) with a DNS-TXT fallback via *.dl.wel1.ru, writes it to /tmp or %TEMP% under disguised names (.cache_<hex>, dotnet_diag_<hex>.exe), chmods it 0755, and spawns it detached via /bin/sh -c or cmd. Sensitive API identifiers including 'child_process' and 'chmodSync' are also reassembled at runtime from fragments to evade static analysis. The fetched binary is unpinned, unverified, and comes from anonymous worker hosts unrelated to any package publisher domain, giving whoever controls those hosts arbitrary code execution on any machine that installs or imports this package.
Decision reason
OpenSSF Malicious Packages via OSV confirms devplatform-table@35.7.6 as malicious (MAL-2026-13266): Malicious code in devplatform-table (npm)