MalwarePublished 5 Aug 2026

specials-mvno-client (npm) · Malicious Code

Affects specials-mvno-clientSource GCVE Database

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

Data as of 6 Aug 2026, 19:26 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12044

What to do

Remove specials-mvno-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
npmspecials-mvno-client	Affected =20.9.8	Fixed in–

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Description

The npm package specials-mvno-client version 20.9.8 contains malicious code that fetches and executes opaque platform-specific binaries from external, non-publisher-controlled domains. The malicious payload is saved to temporary directories under disguised filenames and executed detached from the main process. The package uses obfuscation techniques to evade detection, including assembling hostnames dynamically and using DNS-TXT record fallback channels to deliver code. It respects certain environment variables to avoid execution on monitored hosts. Any system with this package installed should be considered fully compromised, and all secrets and keys on that system should be rotated immediately from a different, clean device.

Impact

Systems with the affected package installed are considered fully compromised. The malicious code grants an external entity control over the affected system by executing opaque binaries fetched from attacker-controlled domains. This can lead to complete system compromise, including unauthorized access to secrets and keys stored on the system. Removal of the package alone does not guarantee eradication of the malicious software or backdoors introduced by the attacker.

Defensive guidance

Immediate removal of the specials-mvno-client package version 20.9.8 is recommended. All secrets, credentials, and keys stored on the compromised system should be rotated from a different, trusted device. Due to the high likelihood of full system compromise, a full incident response investigation and system rebuild may be necessary. Users should avoid using this package version and monitor for updates from the package publisher or security advisories.

Summary

The specials-mvno-client npm package version 20.9.8 includes a malicious module that, upon installation or require, downloads an opaque binary from Cloudflare Workers and other suspicious domains. This binary is written to temporary directories with disguised filenames, permissioned to execute, and launched detached from the main process. The package uses hostname assembly to evade string detection and a DNS-TXT fallback channel to deliver code when HTTPS is unavailable. It also attempts to evade analysis by honoring environment variables that disable telemetry or tracking. The malicious code is not hosted by the package publisher and executes on every install or require, effectively compromising any system using this package.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Aug 2026, 19:26 UTC

Technical details

References

Community reviews