MalwarePublished 5 Aug 2026Updated 18 Aug 2026

checkout-mobile-pay-button (npm) · Malicious Code

Affects checkout-mobile-pay-buttonSource GCVE Database

Malicious package : remove checkout-mobile-pay-button and rotate any secrets on hosts that installed it.

Data as of 18 Aug 2026, 13:48 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12352

What to do

Remove checkout-mobile-pay-button 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-mobile-pay-button	Affected =20.8.3	Fixed in–

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Description

The npm package 'checkout-mobile-pay-button' version 20.8.3 is a malicious lure package that executes attacker-controlled code upon installation or require. It downloads and runs a platform-specific binary from obfuscated attacker-controlled domains, potentially compromising the host system. The package exports a stub class with no legitimate functionality, serving only to deliver and execute malicious payloads. Systems with this package installed should be considered fully compromised, and secrets on those systems should be rotated immediately.

Impact

Any system with this package installed or running is considered fully compromised, as the package downloads and executes arbitrary attacker-controlled binaries. This can lead to complete system takeover, data theft, and persistent malicious presence. All secrets and keys stored on the compromised system should be assumed exposed and require immediate rotation from a clean environment. Removing the package alone does not guarantee removal of all malicious artifacts or backdoors.

Defensive guidance

Remove the 'checkout-mobile-pay-button' package version 20.8.3 immediately from all affected systems. Consider all affected systems fully compromised and perform a thorough incident response, including rotating all secrets and keys from a different, uncompromised machine. There is no known patch or official fix for this malicious package. Prevention includes avoiding installation of untrusted or suspicious npm packages and verifying package provenance before use.

Summary

The 'checkout-mobile-pay-button' npm package version 20.8.3 is a malicious package masquerading as a mobile pay button platform adapter. Upon loading, it requires a loader script that reconstructs attacker-controlled hostnames using obfuscated string operations. It downloads a platform-specific binary from these domains, writes it to temporary directories under disguised filenames, sets executable permissions, and executes it detached from the main process. Additionally, it uses a DNS TXT record covert channel as a fallback delivery mechanism. The package's exported class is a non-functional stub, with the sole purpose of fetching and executing opaque attacker-controlled code on the host system.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 18 Aug 2026, 13:48 UTC

Technical details

References

Community reviews