The newest npm security advisories as machine-readable JSON: severity, CVSS score and vector, CWEs, affected packages, vulnerable ranges and first patched version. Merged from two GitHub Advisory Database orderings, most recently published and most recently revised, so a newly assigned CVSS or a widened vulnerable range reaches you even when the advisory is months old. Add ?since=<ISO-8601> for only what changed; an empty delta is refused free, so polling costs nothing until there is news.

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