Prototype Pollution in algoliasearch-helper
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | algoliasearch-helper | < 3.6.2 | 3.6.2 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-23433
- https://github.com/algolia/algoliasearch-helper-js/commit/4ff542b70b92a6b81cce8b9255700b0bc0817edd
- https://github.com/algolia/algoliasearch-helper-js
- https://github.com/algolia/algoliasearch-helper-js/blob/3.5.5/src/SearchParameters/index.js%23L291
- https://snyk.io/vuln/SNYK-JS-ALGOLIASEARCHHELPER-1570421
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-1321, CWE-915- Platform
- npm
- Package
algoliasearch-helper- Disclosed
- 23.11.2021
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-vpf5-82c8-9v36 - CC BY 4.0
Vulnerability history: algoliasearch-helper
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 11.2021 09.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- Medium 1
Disclosures per year
- 2021: 1
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 1
- 2026: 0
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