MalwarePublished 5 Aug 2026

hubert-react-query (npm) · Malicious Code

Affects hubert-react-querySource GCVE Database

Malicious package : remove hubert-react-query and rotate any secrets on hosts that installed it.

Data as of 6 Aug 2026, 19:28 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12181

What to do

Remove hubert-react-query 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
npmhubert-react-query	Affected =20.6.8	Fixed in–

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Description

The npm package hubert-react-query version 20.6.8 contains malicious code that executes automatically upon import. It reconstructs attacker-controlled Cloudflare Workers hostnames at runtime to download a platform-specific native binary, which it writes to temporary directories, sets executable permissions, and executes detached from the parent process. This binary is unrelated to the package's advertised functionality and effectively compromises any system running the package. Immediate removal and secret/key rotation are strongly advised.

Impact

Any system with this package installed or running is considered fully compromised. The malicious binary grants attackers full control over the affected computer. All secrets and keys stored on the compromised system should be considered exposed and must be rotated from a separate, secure device. Removing the package alone does not guarantee removal of all malicious components or persistence mechanisms.

Defensive guidance

Remove the hubert-react-query package version 20.6.8 immediately from all affected systems. Rotate all secrets, credentials, and keys that were stored or accessible on compromised machines from a secure environment. Because the malicious binary executes automatically on import and may establish persistence, assume full compromise and conduct a thorough incident response.

Summary

The hubert-react-query npm package (version 20.6.8) includes malicious code in its main entry point (index.js) that unconditionally requires a setup.js script. This script dynamically reconstructs Cloudflare Workers hostnames and uses a DNS-TXT base64 fallback channel to download a platform-specific native binary via HTTPS. The binary is saved to temporary system directories with disguised filenames, permissioned as executable, and launched detached from the parent process. The package masquerades this behavior as telemetry but actually delivers an opaque compiled binary unrelated to react-query functionality. Execution occurs simply by requiring the module, leading to full system compromise.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Aug 2026, 19:28 UTC

Technical details

References

Community reviews