{"cve":"CVE-2021-23433","nvd":{"published":"2021-11-19T20:15:17.903","modified":"2026-06-17T03:38:45.270","status":"Modified","description":"The package algoliasearch-helper before 3.6.2 are vulnerable to Prototype Pollution due to use of the merge function in src/SearchParameters/index.jsSearchParameters._parseNumbers without any protection against prototype properties. Note that this vulnerability is only exploitable if the implementation allows users to define arbitrary search patterns.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-1321"],"references":["https://github.com/algolia/algoliasearch-helper-js/blob/3.5.5/src/SearchParameters/index.js%23L291","https://github.com/algolia/algoliasearch-helper-js/commit/4ff542b70b92a6b81cce8b9255700b0bc0817edd","https://snyk.io/vuln/SNYK-JS-ALGOLIASEARCHHELPER-1570421","https://github.com/algolia/algoliasearch-helper-js/blob/3.5.5/src/SearchParameters/index.js%23L291","https://github.com/algolia/algoliasearch-helper-js/commit/4ff542b70b92a6b81cce8b9255700b0bc0817edd"],"products":["algolia:algoliasearch-helper"],"source":"nvd","synced_at":"2026-10-19T21:25:41.256909649+00:00"},"epss":{"cve":"CVE-2021-23433","score":0.01626,"percentile":0.76168,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vpf5-82c8-9v36","url":"https://osv.dev/vulnerability/GHSA-vpf5-82c8-9v36","summary":"Prototype Pollution in algoliasearch-helper","modified":"2026-09-10T03:49:16.257548510Z","packages":[{"ecosystem":"npm","name":"algoliasearch-helper","purl":"pkg:npm/algoliasearch-helper","ranges":["<3.6.2"],"fixed":["3.6.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}