🛡️ MAL-2026-12601 — checkout-use-disable-interaction

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

Description

Malicious code in checkout-use-disable-interaction (npm)

Source: amazon-inspector

On require() of checkout-use-disable-interaction, index.js loads _vendor.js which downloads a platform-specific native binary from Cloudflare Workers subdomains under oob-worker.cf*.workers.dev, with a DNS TXT-record fallback channel at c.<domain> and 0.<domain>..N.<domain> under *.dl.wel1.ru whose base64-decoded fragments are concatenated into the same executable payload. Destination hostnames are assembled at runtime by string-splitting and array-join to evade static analysis. The payload is written to /var/tmp/.cache_<uid> on Linux/macOS or %TEMP%\dotnet_diag_<uid>.exe on Windows — cover-story filenames designed to blend with system artifacts — then chmod 0755 and spawned detached via /bin/sh -c '<path> &' or cmd /c start /b. A /tmp/.analytics_state (or %TEMP%\analytics_state) marker file is written and its mtime used as a ~6h re-run gate so the dropper re-fires periodically whenever any consumer imports the package. The package README advertises a benign microservice module; the shipped code does not match that purpose.

Affected software

MAL-2026-12601 is recorded against 1 package.

  • checkout-use-disable-interaction

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-use-disable-interaction — —

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