Vulnerability record · CVE-2025-63704 · published 7 May 2026

CVE-2025-63704: Prototype pollution vulnerability

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.

9.8 CVSS 3.1 Critical EPSS 0.48% · top 61.4% CWE-1321 · Prototype pollution Deferred

9.8CVSS 3.1 base score

0.48%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

3References

17 Jun 2026Last modified by 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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Link	Tags
https://gist.github.com/6en6ar/d62f614dbb2b1032b5e45a56fe26ec8b
https://github.com/victorteokw/query-string-parser/issues/3
https://www.npmjs.com/package/query-string-parser?activeTab=readme

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Same products first, then exploited flaws of the same weakness class.

8.6CVE-2026-34621Adobe Acrobat Reader prototype pollution leads to code executionAdobe Acrobat and Reader (versions 24.001.30356, 26.001.21367 and earlier) are affected by prototype pollution (CWE-1321) that can result in arbitrar…KEVEPSS 2.2%analysed11 Apr 2026

Source: NIST National Vulnerability Database (record CVE-2025-63704), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.