OpenSSF/OSV advisory MAL-2025-41438 confirms this npm version as malicious. The nx project and associated plugins were compromised via a vulnerable GitHub workflow that allowed code injection and the theft of an NPM token.
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in @nx/eslint (npm)
Details
The nx project and associated plugins were compromised via a vulnerable GitHub workflow that allowed code injection and the theft of an NPM token.
Decision reason
OpenSSF Malicious Packages via OSV confirms @nx/eslint@21.5.0 as malicious (MAL-2025-41438): Malicious code in @nx/eslint (npm)