CVE-2025-63704

NPM package query-parser-string 1.0.0 is vulnerable to Prototype Pollution

Critical · published May 7, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
40.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00476 · 40.2th percentile
Published
2026-05-07T00:00Z
EPSS history
Timeline
  • 07 MAY 00:00Z
    NPM package query-parser-string 1.0.0 is vulnerable to Prototype Pollution
    cvelistv5