MalwarePublished 5 Aug 2026

checkout-input-email-logic (npm) · Malicious Code

Affects checkout-input-email-logicSource GCVE Database

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

Data as of 5 Aug 2026, 15:56 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12568

What to do

Remove checkout-input-email-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-input-email-logic	Affected =35.8.2	Fixed in–

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Description

The npm package 'checkout-input-email-logic' version 35.8.2 contains malicious code that downloads and executes attacker-controlled native binaries on the host machine. This occurs without any hash or signature verification and is triggered upon requiring or installing the package. The malicious code uses obfuscated hostnames and environment variables to evade detection and conditionally execute. No official patch or remediation guidance is currently available.

Impact

Installation or requiring of this package version leads to execution of attacker-supplied native code on the host system, potentially allowing full compromise of the affected environment. The malicious payload is stealthy, uses evasion techniques, and executes without user consent or verification, posing a high risk to system integrity and confidentiality.

Defensive guidance

Users should avoid installing or requiring 'checkout-input-email-logic' version 35.8.2. It is recommended to audit dependencies for this package and remove it if found. Monitor for updates from the package maintainer or npm security advisories for any future remediation.

Summary

The 'checkout-input-email-logic' npm package version 35.8.2 includes malicious functionality in its _bridge.js file. It constructs attacker-controlled hostnames from fragmented strings and uses DNS-TXT chunked-base64 fallback mechanisms to download platform-specific native binaries from suspicious domains unrelated to the package's legitimate telemetry purpose. These binaries are saved in temporary directories under disguised filenames, given executable permissions, and executed detached from the main process. Execution is gated by a stamp file with a TTL and influenced by environment variables that mimic telemetry opt-out settings. There is no integrity verification of the downloaded binaries, and the package does not pin versions, facilitating silent execution of arbitrary native code on the installer's machine.

References

npmjs.com/package/checkout-input-email-logic/v/35.8.2 (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Aug 2026, 15:56 UTC

Technical details

References

Community reviews