On September 27, 2023, we began blocking npm package publishes with differing name or version fields between the manifest and tarball package.json. This blocking protects against obfuscation. The different fields in the manifests have been assessed from a risk-based perspective. We will continue to analyze for other mismatches that can be blocked that won’t have adverse effects on the ecosystem. If a package is blocked, a user may receive an error message similar to “Package ‘version’ is “1.0.4”. It should match “1.0.3” from “package.json” in packaged tarball. Make all changes to package.json before packaging a tarball to publish.” In addition, a new tool, npm pkg fix, can help users fix any validation errors from the registry when they attempt to publish a package.
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