{"id":"CVE-2025-63704","aliases":[],"url":"https://o3.security/vulnerability/CVE-2025-63704","summary":"query-parser-string is vulnerable to Prototype Pollution","details":"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":"2026-05-07T18:30:40Z","modified":"2026-05-12T17:26:28.825256Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.00476,"percentile":0.38959,"asOf":"2026-08-14"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"query-string-parser","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-63704"},{"type":"WEB","url":"https://github.com/victorteokw/query-string-parser/issues/3"},{"type":"WEB","url":"https://gist.github.com/6en6ar/d62f614dbb2b1032b5e45a56fe26ec8b"},{"type":"PACKAGE","url":"https://github.com/victorteokw/query-string-parser"},{"type":"WEB","url":"https://www.npmjs.com/package/query-string-parser?activeTab=readme"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-05-12T17:26:28.825256Z"}}