high7.5
CVE-2025-3193
algoliasearch-helper is vulnerable to Prototype Pollution in _merge()
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | algoliasearch-helper | >= 2.0.0-rc1, < 3.11.2 | 3.11.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Algolia | Algoliasearch-Helper | from 2.0.0 before 3.11.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/algolia/algoliasearch-helper-js/commit/776dff23c87b0902e554e02a8c2567d2580fe12a
- https://github.com/algolia/algoliasearch-helper-js/issues/922
- https://security.snyk.io/vuln/SNYK-JS-ALGOLIASEARCHHELPER-3318396
- https://github.com/advisories/GHSA-529q-4j3p-7c5r
- https://nvd.nist.gov/vuln/detail/CVE-2025-3193