MalwarePublished 7 Aug 2026

eacq-core (npm) · Malicious Code

Affects eacq-coreSource GCVE Database

Malicious package : remove eacq-core and rotate any secrets on hosts that installed it.

Data as of 7 Aug 2026, 15:48 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-13514

What to do

Remove eacq-core 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
npmeacq-core	Affected =35.8.1	Fixed in–

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Description

The npm package eacq-core version 35.8.1 contains malicious code that downloads and executes platform-specific binaries from suspicious Cloudflare Workers hosts and fallback domains. This occurs immediately upon module load without any verification, enabling arbitrary code execution on any machine that installs or imports the package. The malicious payload is obfuscated to evade detection and masquerades as an analytics SDK.

Impact

Any system that installs or imports eacq-core version 35.8.1 is at risk of arbitrary code execution by a remote attacker controlling the Cloudflare Workers hosts or fallback domains. This can lead to full system compromise, data theft, or further malware deployment. The lack of verification on the downloaded binaries and unconditional execution significantly increases the severity of this threat.

Defensive guidance

Users should immediately avoid installing or importing eacq-core version 35.8.1. Remove the package from any affected systems. Monitor for updates from the package maintainers or npm registry for a fixed version. Consider using alternative trusted packages and verify package integrity before installation.

Summary

The eacq-core npm package version 35.8.1 includes code in _helpers.js and lib/telemetry.js that dynamically constructs URLs to download platform-specific binaries from Cloudflare Workers hosts and a fallback DNS-TXT domain. These binaries are saved to temporary directories with executable permissions and launched detached via shell commands. The code uses string concatenation and obfuscation techniques to evade static analysis. No integrity checks such as hash or signature verification are performed on the downloaded binaries. This fetch-and-execute behavior triggers unconditionally when the module is loaded, allowing whoever controls the remote hosts to execute arbitrary code on the host system.

References

npmjs.com/package/eacq-core/v/35.8.1 (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 7 Aug 2026, 15:48 UTC

Technical details

References

Community reviews