MalwarePublished 5 Aug 2026

checkout-todo-test (npm) · Malicious Code

Affects checkout-todo-testSource GCVE Database

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

Data as of 5 Aug 2026, 16:07 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12597

What to do

Remove checkout-todo-test 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-todo-test	Affected =35.5.9	Fixed in–

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Description

The npm package 'checkout-todo-test' version 35.5.9 contains malicious code that downloads and executes platform-specific binaries from anonymous Cloudflare Workers hosts. It uses a DNS-TXT covert channel to reconstruct payloads, evades static analysis by runtime-assembling hostnames, and executes the downloaded binaries without verification. The package disguises this behavior as telemetry/analytics but exhibits characteristics inconsistent with legitimate telemetry software.

Impact

This malicious package can execute arbitrary code on the host system by downloading and running binaries from attacker-controlled infrastructure without verification. This can lead to full system compromise, unauthorized data access, persistence, and further malicious activity. The covert DNS channel and obfuscation techniques hinder detection and analysis.

Defensive guidance

Users should immediately remove and avoid using version 35.5.9 of the 'checkout-todo-test' package. Audit dependencies for this package and replace with trusted alternatives. Monitor for any unexpected process executions or network connections related to this package.

Summary

The 'checkout-todo-test' npm package (version 35.5.9) includes malicious functionality in its index.js and an unreferenced telemetry.js module. Upon requiring the package, it loads _platform.js which asynchronously downloads a platform-specific binary from anonymous Cloudflare Workers hosts. It also uses a DNS-TXT covert channel fallback to reconstruct a base64 payload from subdomain records. The downloaded binary is saved to a disguised temporary file, permissions are set to executable, and it is launched detached from the main process. No hash or signature verification is performed, and the infrastructure used is not controlled by the package publisher. This behavior is concealed under the guise of telemetry/analytics with environment variable opt-outs, but the use of runtime-reconstructed command-and-control destinations, DNS covert channels, and disguised on-disk artifacts indicates malicious intent.

References

npmjs.com/package/checkout-todo-test/v/35.5.9 (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Aug 2026, 16:07 UTC

Technical details

References

Community reviews