CVE-2025-3193

Versions of the package algoliasearch-helper from 2.0.0-rc1 and before 3.11.2 are vulnerable to Prototype Pollution in the _merge() function in merge.js, which allows constructor.prototype to be written even though doing so throws an error. In the "extreme edge-case" that the resulting error is caught, code injected into the user-supplied search parameter may be exeucted. This is related to but distinct from the issue reported in [CVE-2021-23433](https://security.snyk.io/vuln/SNYK-JS-ALGOLIASEARCHHELPER-1570421). **NOTE:** This vulnerability is not exploitable in the default configuration of InstantSearch since searchParameters are not modifiable by users.

Score

CVSS 3.1 7.5 High

Status

Modified - report@snyk.io

Published

2025-09-27

Last modified

2026-10-19

Weaknesses

CWE-1321

Affected products

• Algoliasearch-helper (Algolia)

References

• https://security.snyk.io/vuln/SNYK-JS-ALGOLIASEARCHHELPER-3318396
• https://github.com/algolia/algoliasearch-helper-js/issues/922
• https://github.com/algolia/algoliasearch-helper-js/commit/776dff23c87b0902e554e02a8c2567d2580fe12a