MalwarePublished 10 Jul 2026Updated 1 Sep 2026

consumerweb (npm) · Malicious Code

Affects consumerwebSource GCVE Database

Malicious package : remove consumerweb and rotate any secrets on hosts that installed it.

Data as of 12 Sep 2026, 19:01 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-10181

What to do

Remove consumerweb 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
npmconsumerweb	Affected =2200.4.2	Fixed in–

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Description

A malicious npm package named 'consumerweb' version 2200.4.2 contains preinstall and postinstall scripts that execute code to collect host environment information and exfiltrate it to an attacker-controlled domain. The package appears to be part of a dependency confusion attack targeting internal package names, leaking sensitive environment details without user consent.

Impact

Successful installation of this malicious package confirms the internal package name is squattable and leaks sensitive environment information such as host identifiers and DNS configuration to an attacker-controlled endpoint. This can aid attackers in further reconnaissance and targeted attacks within the victim's environment. The exfiltration occurs without user consent or awareness.

Defensive guidance

Users should avoid installing the affected version (=2200.4.2) of the 'consumerweb' package. Verify package sources and avoid installing packages with suspicious or internal-looking names from public registries. Monitor for updates or advisories from the package maintainer or npm registry regarding remediation. Since this is not a cloud service, remediation depends on user action to avoid or remove the malicious package.

Summary

The 'consumerweb' npm package version 2200.4.2 executes code during both preinstall and postinstall lifecycle hooks that runs an index.js script. This script collects host reconnaissance data including hostname, username, home directory, current working directory, DNS servers, and package metadata. The collected data is exfiltrated via DNS lookups and HTTPS POST requests to a subdomain of oast.fun, an attacker-controlled out-of-band interaction service. The package name and description suggest it is attempting a dependency confusion attack by squatting on an internal package name, confirming the internal package's existence and leaking environment information to the attacker. There is no legitimate use case for this data collection and exfiltration, and no installer opt-in is involved.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 12 Sep 2026, 19:01 UTC

Technical details

References

Community reviews