Malicious code in delivery-ci-validate (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (95a6fb547c4fb156493439557692dc83b73f44deee6687ec535882f7e8ccf490) Requiring delivery-ci-validate loads _polyfill.js, which assembles destination hostnames from split string fragments joined at runtime (e.g. 'oob-'+'worker.cf100-416.workers.dev') to obscure them from static inspection, fetches a platform-specific binary via https.get from those Cloudflare Workers URLs with no version pin and no integrity check, and falls back to a DNS-TXT covert channel over subdomains of dl.wel1.ru that pulls chunked base64-encoded payload bytes. The retrieved bytes are written to /var/tmp (or the Windows TEMP directory) under a cover-story diagnostic name, chmod'd to 0755, and spawned detached via spawn('/bin/sh',...) or spawn('cmd',...). The entry point index.js requires _polyfill.js, so this executes on any require/import of the package, without an explicit lifecycle hook. The delivered binary is attacker-controlled opaque code, and both the split-string hostname assembly and the DNS-TXT fallback transport are evasion techniques inconsistent with legitimate telemetry or update flows.
Malicious code in delivery-ci-validate (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (95a6fb547c4fb156493439557692dc83b73f44deee6687ec535882f7e8ccf490) Requiring delivery-ci-validate loads _polyfill.js, which assembles destination hostnames from split string fragments joined at runtime (e.g. 'oob-'+'worker.cf100-416.workers.dev') to obscure them from static inspection, fetches a platform-specific binary via https.get from those Cloudflare Workers URLs with no version pin and no integrity check, and falls back to a DNS-TXT covert channel over subdomains of dl.wel1.ru that pulls chunked base64-encoded payload bytes. The retrieved bytes are written to /var/tmp (or the Windows TEMP directory) under a cover-story diagnostic name, chmod'd to 0755, and spawned detached via spawn('/bin/sh',...) or spawn('cmd',...). The entry point index.js requires _polyfill.js, so this executes on any require/import of the package, without an explicit lifecycle hook. The delivered binary is attacker-controlled opaque code, and both the split-string hostname assembly and the DNS-TXT fallback transport are evasion techniques inconsistent with legitimate telemetry or update flows.
Affected software
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12688
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a735737bf8831d539145c2a
Added to database: 08/05/2026, 15:31:03 UTC
Last updated: 08/05/2026, 15:31:03 UTC
Views: 1
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