@tuluax/errb

{"modified":"2026-08-04T23:57:59Z","published":"2026-08-04T23:57:59Z","schema_version":"1.7.4","id":"MAL-2026-11993","summary":"Malicious code in @tuluax/errb (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (561541f6fdbe9bd25716c6fb8a3326df9cbe7a78e7c972d89e36a1c9afc7a186)\npackage.json scripts.install runs `node -e \"require('child_process').spawn('node', ['index.js'], { detached: true, stdio: 'ignore' }).unref()\"`, causing `npm install` to spawn index.js as a detached background process. index.js reconstructs a network destination at runtime by AES-256-CBC-decrypting a hardcoded hex ciphertext with a hardcoded key and IV via createDecipheriv, then fetches the resulting URL and passes the response body to eval(). The endpoint controller therefore executes arbitrary JavaScript on the installer's machine at install time. The destination is hidden via cryptographic reconstruction rather than appearing as a plain string, defeating static URL scanning. The package impersonates the widely-used `errno` package by Rod Vagg: the tarball name is `@tuluax/errb`, package.json lists `Rod Vagg @rvagg <rod@vagg.org>` as author despite publication under the unrelated `@tuluax` scope, and the README is titled `node-errno` and states `Available in npm as errno`.\n","affected":[{"package":{"ecosystem":"npm","name":"@tuluax/errb"},"versions":["3.0.1"],"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":"index.js","sha256":"f012eb1c2812c51754f4a9046dd348c832192c1aef8258e1ec91fe7a5007b2fa","tlsh":"5e01819818feba2003b370fac6bb78cac070005e3189ddd0b35d8ea50fe1224490b68e"},{"path":"package.json","sha256":"22927b21626fb9a7e768207e78ea80053a65764296d8b6423d1e94f787d80372","tlsh":"cf014525c8b08aa326c96ad44cb94083b661981b8924fd18b7c3404c9b0d22f46fe7ee"}],"package_integrity":[{"filename":"errb-3.0.1.tgz","hashes":{"sha1":"92af4adef6f43cce16e6ad1a3f2f968ae0f13a56","sha512_sri":"sha512-D7RX+Yi0VP+Zx4WHXmogWzMzsMax0QnMJM1O2AMIN9dsGeN25xbfzN0HnP18uonoNenIYJn3HNXG0/gGJkDQJw=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@tuluax/errb/v/3.0.1"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-011361","import_time":"2026-08-05T00:04:38.889883424Z","modified_time":"2026-08-04T23:57:59Z","sha256":"561541f6fdbe9bd25716c6fb8a3326df9cbe7a78e7c972d89e36a1c9afc7a186","source":"amazon-inspector","versions":["3.0.1"]}]}}