MalwarePublished 27 Jun 2026Updated 29 Jun 2026

crossmint-wallets-sdk (npm) · Malicious Code

Affects crossmint-wallets-sdkSource GCVE Database

Malicious package : remove crossmint-wallets-sdk and rotate any secrets on hosts that installed it.

Data as of 29 Jun 2026, 22:43 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-6545

What to do

Remove crossmint-wallets-sdk 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
npmcrossmint-wallets-sdk	Affected =1.0.0	Fixed in–

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Description

The crossmint-wallets-sdk npm package version 1.0.0 is a malicious package impersonating a legitimate wallet SDK. It contains preinstall and index scripts that execute automatically during installation, collecting host identifiers and exfiltrating them to a hardcoded external server. This behavior allows attackers to perform reconnaissance and potentially gain control over the affected system. Systems with this package installed should be considered fully compromised, and all secrets and keys must be rotated from a secure environment. Removal of the package alone does not guarantee eradication of all malicious components.

Impact

Installation of this malicious package leads to immediate exfiltration of host identifiers to an attacker-controlled server. This compromises the confidentiality of the host environment and may allow attackers to gain further access or control. The compromise is severe enough that all secrets and keys on the affected system should be considered exposed and require immediate rotation. The presence of this package indicates a full system compromise with potential persistence beyond package removal.

Defensive guidance

The affected package version is 1.0.0 and should be removed immediately. Systems with this package installed must be treated as fully compromised. All secrets, credentials, and keys stored on the affected system should be rotated from a different, secure machine. Additional forensic analysis and remediation may be necessary to ensure complete removal of any backdoors or malware installed as a result of this package.

Summary

The crossmint-wallets-sdk package version 1.0.0 is a typosquatting malicious npm package that executes code during the npm install preinstall lifecycle event. It imports child_process, reads the hostname of the host machine, and sends this information via HTTPS POST to a hardcoded external endpoint. This exfiltration occurs before any user code runs, enabling credential and reconnaissance data theft from developers or build systems installing the package. Due to the nature of this attack, any system with this package installed is considered fully compromised.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 29 Jun 2026, 22:43 UTC

Technical details

References

Community reviews