CVE-2025-63704

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

NPM package query-parser-string 1.0.0 is vulnerable to Prototype Pollution. The package does not properly sanitize user supplied query parameters and merges them to the newly created object.

Published 2026-05-07. Last modified 2026-06-17.