CVE-2025-3193: algoliasearch-helper is vulnerable to Prototype Pollution in _merge()
(updated )
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.
NOTE: This vulnerability is not exploitable in the default configuration of InstantSearch since searchParameters are not modifiable by users.
References
- github.com/advisories/GHSA-529q-4j3p-7c5r
- github.com/algolia/algoliasearch-helper-js
- github.com/algolia/algoliasearch-helper-js/commit/776dff23c87b0902e554e02a8c2567d2580fe12a
- github.com/algolia/algoliasearch-helper-js/issues/922
- nvd.nist.gov/vuln/detail/CVE-2025-3193
- security.snyk.io/vuln/SNYK-JS-ALGOLIASEARCHHELPER-3318396
Code Behaviors & Features
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