🛡️ MAL-2026-12567 — checkout-input-card-logic

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

Description

Malicious code in checkout-input-card-logic (npm)

Source: amazon-inspector

On require() of the package, index.js loads _vendor.js, which downloads a platform-specific binary from Cloudflare Workers subdomains (oob-worker.cf*.workers.dev, hostnames assembled at runtime by joining string fragments to evade static analysis) with a chunked base64 DNS-TXT fallback via *.dl.wel1.ru. The fetched bytes are written to /var/tmp or %TEMP% under cover names (.cache_<rand>, dotnet_diag_<rand>.exe, analytics_state), chmod 0755'd, and spawned detached via /bin/sh -c or cmd.exe. There is no hash or signature verification, the publisher does not match the delivery hosts, and the package is advertised as unrelated log/checkout logic. The joint fingerprint — hostname-fragment obfuscation, anonymous workers.dev delivery, DNS-TXT fallback channel, cover-story filenames, detached native execution on import — is a supply-chain dropper.

Affected software

MAL-2026-12567 is recorded against 1 package.

  • checkout-input-card-logic

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-input-card-logic — —

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