{"id":"MAL-2026-17482","summary":"Malicious code in css-logical-prop-shim (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (d0ffba65f80ee8f200199c8c90ebb6297b8590537c80ea50bb34874d91665b5f)\nThe package ships thunderboltRegistry.js which imports child_process and invokes execSync with curl commands at multiple sites (lines 30, 39, 47, 48). The declared purpose of the package is a CSS logical-property shim, which has no legitimate need to spawn shells or make outbound curl requests. The co-location of child_process + repeated execSync('curl...') calls in a package whose stated purpose is a frontend CSS polyfill is the shape of a dropper or exfiltration helper rather than library code, and the file name 'thunderboltRegistry' is unrelated to any CSS functionality.\n","modified":"2026-10-04T23:30:06.653664618Z","published":"2026-10-04T23:14:12Z","database_specific":{"malicious-packages-origins":[{"modified_time":"2026-10-04T23:14:12Z","sha256":"d0ffba65f80ee8f200199c8c90ebb6297b8590537c80ea50bb34874d91665b5f","source":"amazon-inspector","versions":["1.0.0"],"id":"IN-MAL-2026-020886","import_time":"2026-10-04T23:16:30.429895784Z"}]},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/css-logical-prop-shim/v/1.0.0"}],"affected":[{"package":{"name":"css-logical-prop-shim","ecosystem":"npm","purl":"pkg:npm/css-logical-prop-shim"},"versions":["1.0.0"],"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"indicators":{"package_integrity":[{"filename":"css-logical-prop-shim-1.0.0.tgz","hashes":{"sha1":"d65ccb03c01d7a0b8012d0b3fec9d35d10cf0e2b","sha512_sri":"sha512-EV5dTcoIc0LQPqgzF+dw3L56/G1ZK8GEV4Ac1nDEJ1egZjezIf2MdxjN6DJY/S7jweF2LeTQ8emVByxBtze/Ww=="}}],"evidence_files":[{"sha256":"38ab2710c4bcd5da44b6d85296d82643b997b2538870780520ec6707a7b57dfe","tlsh":"a3a176a8b686b1215e9779385b3f600fe1b789832c8ceec0b54949f13f3451956353f5","path":"thunderboltRegistry.js"}]},"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-logical-prop-shim/MAL-2026-17482.json"}}],"schema_version":"1.9.0","credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"}]}