MalwarePublished 29 Jul 2026

def-open-client (npm) · Malicious Code

Affects def-open-clientSource GCVE Database

Malicious package : remove def-open-client and rotate any secrets on hosts that installed it.

Data as of 30 Jul 2026, 07:22 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-11183

What to do

Remove def-open-client 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
npmdef-open-client	Affected–	Fixed in–

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Description

The def-open-client npm package contains malicious code that compromises any computer on which it is installed or running. Installation of this package may result in full system compromise, including unauthorized access to secrets and keys stored on the affected machine. Removal of the package does not guarantee elimination of all malicious components, as attackers may have established persistent control.

Impact

Full system compromise on any machine with the def-open-client package installed. Potential exposure and theft of all secrets and keys stored on the compromised system. Persistent malicious presence may remain even after package removal, risking ongoing unauthorized access and control.

Defensive guidance

Remove the def-open-client package immediately. Rotate all secrets and keys from a separate, uncompromised system. Consider the affected computer fully compromised and perform a thorough forensic analysis and system rebuild if possible. There is no known patch or fix for this malicious package; remediation relies on removal and credential rotation.

Summary

The def-open-client package distributed via npm has been identified as containing malicious code. According to the source advisory, any system with this package installed should be considered fully compromised. Attackers may have gained full control over the system, potentially accessing and exfiltrating sensitive information such as secrets and keys. Immediate rotation of all credentials from a separate, trusted system is advised. Because the malicious code may have established persistence beyond the package itself, simply uninstalling def-open-client does not ensure complete remediation.

References

github.com/advisories/GHSA-pxmg-gr7p-wx8p (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 30 Jul 2026, 07:22 UTC

Technical details

References

Community reviews