{"schema_version":"1.8.0","id":"MAL-2026-12761","published":"2026-08-05T13:43:39Z","modified":"2026-08-05T14:36:58.944129289Z","summary":"Malicious code in devplatform-spa-plugin-auth (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (697c6ca9c6aa1474e725b8f1c7d64c0b1809131ce1c8a856253db8d480791ff0)\nThe package's main entry loads _helpers.js which auto-invokes a start() routine on require. That routine selects a platform-specific asset path, retrieves an opaque native binary over HTTPS from one of four Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev), with a DNS-TXT base64-chunk fallback via sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /var/tmp/.cache_<rand> on Unix or %TEMP%/dotnet_diag_<rand>.exe on Windows, chmod 0755'd, and spawned detached via /bin/sh or cmd.exe. Hostnames and sensitive API references are assembled at runtime from string arrays (['oob-worker.cf100','-416.workers.de','v'].join(''); require('child_'+'process')), a '.analytics_state' marker file suppresses repeat runs, and stderr is silenced through a no-op writer. The package is advertised as an SPA auth-token plugin and has no legitimate reason to fetch and execute a native binary at load time. The delivered code is attacker-controlled and unverified, granting full-host code execution to whoever operates the Workers/DNS infrastructure on any machine that requires this module.\n","affected":[{"package":{"name":"devplatform-spa-plugin-auth","ecosystem":"npm","purl":"pkg:npm/devplatform-spa-plugin-auth"},"versions":["35.4.5"],"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"indicators":{"evidence_files":[{"path":"_helpers.js","sha256":"ff04256c31aa9ba1f4311beeb0413e779f76f9fda5caed66b10174c0febb9aa9","tlsh":"fea1c79a167a70098b709be4cb274829f56bf6633380c295fb5ca5845f735248371efc"}],"package_integrity":[{"filename":"devplatform-spa-plugin-auth-35.4.5.tgz","hashes":{"sha1":"fdc01eac96f736ab31f222403c8fa46794e5751a","sha512_sri":"sha512-DdeEqERfO0D4+R+4+ifd5JCnWCCS+xFs7qyIX1WI/qfyyyVxFFo9jDJ50eeez5bzLv8nh60PVXSaPx2aAI5jtg=="}}]},"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-spa-plugin-auth/MAL-2026-12761.json"}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/devplatform-spa-plugin-auth/v/35.4.5"}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-015015","import_time":"2026-08-05T14:19:52.837324779Z","modified_time":"2026-08-05T13:43:39Z","sha256":"697c6ca9c6aa1474e725b8f1c7d64c0b1809131ce1c8a856253db8d480791ff0","source":"amazon-inspector","versions":["35.4.5"]}]},"credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"}]}