MalwarePublished 5 Aug 2026

checkout-bnpl-logic (npm) · Malicious Code

Affects checkout-bnpl-logicSource GCVE Database

Malicious package : remove checkout-bnpl-logic and rotate any secrets on hosts that installed it.

Data as of 5 Aug 2026, 15:51 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12545

What to do

Remove checkout-bnpl-logic from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
npmcheckout-bnpl-logic	Affected =35.9.2	Fixed in–

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Description

The npm package 'checkout-bnpl-logic' version 35.9.2 contains malicious code that executes an attacker-controlled binary on the host system upon import. The package exports a decoy Logger class but actually fetches a platform-specific binary from obfuscated external sources, writes it to a hidden temporary location, sets executable permissions, and runs it detached without user awareness. There is no integrity verification of the downloaded binary, and the network destinations are designed to evade blocking. This behavior effectively results in remote code execution on any system that installs and imports this package.

Impact

Importing this package results in silent execution of arbitrary attacker-controlled binaries on the host system, leading to full compromise potential. The lack of integrity checks and obfuscated network destinations increase the risk of undetected malicious activity. This can lead to unauthorized access, data theft, persistence, and further system compromise.

Defensive guidance

Users should avoid installing or importing version 35.9.2 of 'checkout-bnpl-logic'. Audit existing dependencies for this package and remove or replace it immediately. Employ supply chain security best practices such as verifying package integrity and using trusted sources. Monitor for updates from the package publisher or security advisories for any official fixes.

Summary

The 'checkout-bnpl-logic' npm package version 35.9.2 masquerades as a logging utility but includes malicious functionality in its '_polyfill.js' module. Upon import, it reconstructs hostnames from string arrays and downloads a platform-specific binary from anonymous Cloudflare Workers domains and fallback DNS TXT records. The binary is saved to a hidden temporary path with executable permissions and launched detached, with all standard error output suppressed. No version pinning, hash checking, or signature verification is performed, and the external hosts are not affiliated with the package publisher. The Logger class is a facade; the true effect is silent execution of attacker-controlled code on the host.

References

npmjs.com/package/checkout-bnpl-logic/v/35.9.2 (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Aug 2026, 15:51 UTC

Technical details

References

Community reviews