🛡️ MAL-2026-12352 — checkout-mobile-pay-button

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

Description

Malicious code in checkout-mobile-pay-button (npm)

Source: amazon-inspector

[email protected] is a lure package: its name and README describe a 'mobile pay button platform adapter', but index.js unconditionally require()'s _loader.js on load. _loader.js reconstructs attacker-controlled hostnames at runtime via string-split/join obfuscation (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), downloads a platform-specific binary via https.get, writes it to /tmp or %TEMP% under a disguised name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe with.unref(). A DNS TXT covert channel over tin.dl.well1.site / tina.dl.well1.site / ldr.dl.well1.site / win.dl.well1.site (c.<domain> chunk-count then i.<domain> base64 chunks) provides a fallback delivery path when the workers.dev origins fail. The exported CheckoutMobilePayButton class is a stub with no real functionality; the package's only effect on install/require is fetching and executing opaque attacker-controlled bytes on the installer's host.

Affected software

MAL-2026-12352 is recorded against 1 package.

  • checkout-mobile-pay-button

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-mobile-pay-button — —

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