CVE-2025-63704

CRITICALNVD 9.89.8—

9.8

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 v3: 9.8
EG Score: 9.8(high)
EPSS: 5.9%
KEV: Not listed

Published

May 7, 2026

Last Modified

May 8, 2026

Advisory Details (2)

Auto-updated May 9, 2026

No patch confirmed yet.

generic

Issue · GitHub

https://github.com/victorteokw/query-string-parser/issues/3

generic

Public disclosure for security issue in query-string-parser npm package through version 1.0.0 · GitHub

https://gist.github.com/6en6ar/d62f614dbb2b1032b5e45a56fe26ec8b

Affected Packages

(1 across 1 ecosystem)

npm(1)

Package	Vulnerable range	Fixed in	Dependents
query-string-parser	1.0.0	—	—

Data Freshness Timeline

(refreshed 18× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:40 UTCepss_batch
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Frequently asked(5)

What is CVE-2025-63704?

CVE-2025-63704 is a critical vulnerability published on May 7, 2026. 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.

When was CVE-2025-63704 disclosed?

CVE-2025-63704 was first published in the National Vulnerability Database on May 7, 2026, with the most recent update on May 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-63704 actively exploited?

CVE-2025-63704 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-63704?

CVE-2025-63704 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2025-63704?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-63704, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-63704

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