query-parser-string is vulnerable to Prototype Pollution

CRITICAL 9.8CVE-2025-63704 · GHSA-587p-w43q-4hjx · Published 07/05/2026 · updated 17/06/2026

Package	Affected versions	Patched versions
query-string-parser npm	`= 1.0.0`	No fix yet

Description

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.

NVD description

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.

References

nvd.nist.gov/vuln/detail/CVE-2025-63704 · ADVISORY
victorteokw/query-string-parser · WEB
gist.github.com/6en6ar/d62f614dbb2b1032b5e45a56fe26ec8b · WEB
victorteokw/query-string-parser · PACKAGE
npmjs.com/package/query-string-parser · WEB

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