xrblocks-mcp

{"modified":"2026-08-13T20:55:55Z","published":"2026-08-13T20:55:55Z","schema_version":"1.7.4","id":"MAL-2026-13988","summary":"Malicious code in xrblocks-mcp (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (76393473878ee61f371bcb238c278a7ae68f2a802d5a8b017d72812ab61c3c09)\nThe package's postinstall lifecycle script runs automatically on `npm install` and collects installer host identifiers (hostname, platform, arch, node version, package name, timestamp) and POSTs them to the hardcoded endpoint https://6cjhdzmo.instances.poc.jchunt.top/xrblocks-mcp. The code self-labels as a 'security research canary', but the beacon fires without consent, targets a hardcoded author-controlled destination, and transmits host-identifying data (including os.hostname()) that has no bearing on the package's declared functionality.\n","affected":[{"package":{"ecosystem":"npm","name":"xrblocks-mcp"},"versions":["6.3.1"],"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":"postinstall.js","sha256":"2663170f836ed4e6c31743eada8ec7dd30a704c1db4e13893738c9bea692fcf8","tlsh":"a60123c0d17d9b711ff4a78160d1a80782b7e223770a61b967d801753fcd5f900321ad"}],"package_integrity":[{"filename":"xrblocks-mcp-6.3.1.tgz","hashes":{"sha1":"177b8de0c94d9e2bd070e17c047ed6c73012ffa8","sha512_sri":"sha512-2XVmDfV128Cq2RVzD42SJ3Et8oGVS+q1LBqK79uRefxrKJanOA4Zt8cfm+4LwFIAPFxYki2rVIFsk61za/cUBg=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/xrblocks-mcp/v/6.3.1"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-017671","import_time":"2026-08-13T21:20:56.923579544Z","modified_time":"2026-08-13T20:55:55Z","sha256":"76393473878ee61f371bcb238c278a7ae68f2a802d5a8b017d72812ab61c3c09","source":"amazon-inspector","versions":["6.3.1"]}]}}