MalwarePublished 29 Oct 2025

@gitlab-test/yarn-v4 (npm) · Malicious Code

Affects @gitlab-test/yarn-v4Source GCVE Database

Malicious package : remove @gitlab-test/yarn-v4 and rotate any secrets on hosts that installed it.

Data as of 29 Oct 2026, 22:59 UTC

Classification

Malicious package

Published to npm · OSV MAL-2025-48968

What to do

Remove @gitlab-test/yarn-v4 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
npm@gitlab-test/yarn-v4	Affected =0.3.0	Fixed in–

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

Description

The npm package @gitlab-test/yarn-v4 version 0.3.0 contains malicious code that installs an info stealer during installation. This malware targets sensitive tokens related to npm, git, and CI/CD environments. Any system with this package installed should be considered fully compromised, and all secrets and keys stored on that system must be rotated immediately from a separate, clean device.

Impact

Systems with the malicious package installed are fully compromised, risking exposure of all stored secrets and keys related to npm, git, and CI/CD environments. Attackers may leverage stolen tokens to access repositories, continuous integration systems, and other sensitive infrastructure components, leading to potential further compromise and data breaches.

Defensive guidance

Immediately remove the @gitlab-test/yarn-v4 package version 0.3.0 from affected systems. Rotate all secrets, keys, and tokens that were stored or used on the compromised machine from a separate, trusted device. Due to the high likelihood of full system compromise, consider rebuilding or thoroughly cleaning the affected systems to ensure removal of all malicious artifacts.

Summary

The @gitlab-test/yarn-v4 npm package version 0.3.0 includes a dependency hosted on a custom domain that executes an information-stealing payload during installation. This payload specifically targets tokens used by npm, git, and CI/CD pipelines, potentially allowing attackers to gain unauthorized access to sensitive credentials and systems. Due to the nature of the compromise, removal of the package alone does not guarantee eradication of all malicious components, as the attacker may have established persistent control over the affected system.

References

Community reviews

Loading reviews…

What to do

Affected software

Description

AI analysisMachine-generated, updated 29 Oct 2026, 22:59 UTC

Technical details

References

Community reviews