MalwarePublished 7 Jul 2026Updated 8 Jul 2026

base58-cli (npm) · Malicious Code

Affects base58-cliSource GCVE Database

Malicious package : remove base58-cli and rotate any secrets on hosts that installed it.

Data as of 9 Jul 2026, 10:06 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-6918

What to do

Remove base58-cli 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
npmbase58-cli	Affected 1.0.0 – 1.0.5 6 affected builds	Fixed in–

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Description

The npm package base58-cli versions 1.0.0 through 1.0.5 contain malicious code or depend on a malicious package. Installation or execution of this package can lead to full compromise of the affected system. Secrets and keys stored on the compromised system should be rotated immediately from a separate, secure machine. Removing the package alone may not fully eliminate the malicious presence due to potential persistence mechanisms.

Impact

Systems with any of the affected base58-cli versions installed are considered fully compromised. Attackers may have gained complete control over the system, including access to sensitive information such as secrets and cryptographic keys. This level of compromise can lead to data breaches, unauthorized actions, and persistent malicious presence.

Defensive guidance

Remove the base58-cli package immediately from affected systems. Rotate all secrets and keys that were stored on the compromised system using a secure, uncompromised device. Because full control of the system may have been given to an attacker, consider rebuilding or thoroughly cleaning the affected system to ensure complete removal of malicious software.

Summary

The base58-cli npm package versions 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, and 1.0.5 have been identified as containing malicious code or relying on a dependency with malicious code. This malicious code can fully compromise any computer where the package is installed or running. The compromise includes potential unauthorized access to secrets and keys stored on the system. Due to the severity of the compromise, simply uninstalling the package does not guarantee removal of all malicious artifacts or backdoors.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 9 Jul 2026, 10:06 UTC

Technical details

References

Community reviews