🛡️ MAL-2026-12551 — checkout-create-draft-agreement-am

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Malicious code in checkout-create-draft-agreement-am (npm)

Source: amazon-inspector

On require of checkout-create-draft-agreement-am, index.js loads _polyfill.js which downloads a platform-specific native binary from Cloudflare Workers hosts whose names are assembled by joining split character arrays (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT covert fallback channel on *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru) that retrieves base64-chunked payloads via c.<domain> and i.<domain> TXT queries. The fetched bytes are written to /var/tmp/.cache_<uid> (or Temp\dotnet_diag_<uid>.exe on Windows), chmod 0755, and spawned detached via child_process.spawn("/bin/sh" or "cmd"). No hash or signature verification is performed, hosts are unrelated to the package's declared 'checkout draft agreement' purpose, and the TTL marker is disguised as 'analytics_state' with a self-labeled telemetry opt-out as cover.

Affected software

MAL-2026-12551 is recorded against 1 package.

  • checkout-create-draft-agreement-am

Timeline and source

Published on 5 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-08-05
Updated 2026-08-12
Modified 2026-08-05
Fix URL N/A

Affected Packages

Software From version Fixed in
checkout-create-draft-agreement-am — —

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