MalwarePublished 5 Aug 2026

bigops-auth (npm) · Malicious Code

Affects bigops-authSource GCVE Database

Malicious package : remove bigops-auth and rotate any secrets on hosts that installed it.

Data as of 6 Aug 2026, 19:36 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12149

What to do

Remove bigops-auth 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
npmbigops-auth	Affected =35.8.6	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

The bigops-auth npm package version 35.8.6 contains malicious code that executes at require() time. It reconstructs obfuscated Cloudflare Workers hostnames and DNS resolver domains to fetch a platform-specific executable from attacker-controlled infrastructure. This executable is saved with disguised names mimicking legitimate diagnostic files, given executable permissions, and launched detached on the host system. The package masquerades as an authentication token handler but performs unauthorized remote code execution without integrity checks. Any system with this package installed should be considered fully compromised, and all stored secrets and keys must be rotated from a separate, clean device.

Impact

Systems with bigops-auth version 35.8.6 installed are fully compromised, allowing remote code execution from attacker-controlled infrastructure. This leads to complete loss of system integrity and confidentiality. All secrets and keys stored on the compromised system are at risk and must be rotated immediately from a different, secure device. The malicious code executes automatically during package loading, increasing the risk of unnoticed compromise.

Defensive guidance

The bigops-auth package version 35.8.6 should be removed immediately. Due to the high risk of full system compromise, all secrets and keys stored on the affected system must be rotated from a separate, uncompromised device. Monitor for any signs of persistent malicious activity, as removal of the package alone may not fully remediate the infection. Check vendor or repository advisories for any updates or official remediation guidance.

Summary

The bigops-auth npm package version 35.8.6 includes malicious code that, upon being required, reconstructs obfuscated domain names to download a platform-specific executable from attacker-controlled servers. This executable is saved in temporary directories with names resembling legitimate diagnostic artifacts, made executable, and then executed detached via shell commands. The malicious payload uses environment variables and file modification time cooldowns to evade detection and repeated execution. The package does not verify the integrity of the downloaded executable and executes it immediately on the host, effectively giving full control to the attacker. The package is presented as an authentication token handler but is a supply chain malware threat. Removal of the package does not guarantee full remediation due to potential persistent compromise.

References

Community reviews

Loading reviews…

What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Aug 2026, 19:36 UTC

Technical details

References

Community reviews