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.
References
| Link | Resource |
|---|---|
| https://github.com/algolia/algoliasearch-helper-js/commit/776dff23c87b0902e554e02a8c2567d2580fe12a | Patch |
| https://github.com/algolia/algoliasearch-helper-js/issues/922 | Exploit Issue Tracking Patch |
| https://security.snyk.io/vuln/SNYK-JS-ALGOLIASEARCHHELPER-3318396 | Exploit Third Party Advisory |
Configurations
History
03 Oct 2025, 18:27
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Algolia algoliasearch-helper
Algolia |
|
| References | () https://github.com/algolia/algoliasearch-helper-js/commit/776dff23c87b0902e554e02a8c2567d2580fe12a - Patch | |
| References | () https://github.com/algolia/algoliasearch-helper-js/issues/922 - Exploit, Issue Tracking, Patch | |
| References | () https://security.snyk.io/vuln/SNYK-JS-ALGOLIASEARCHHELPER-3318396 - Exploit, Third Party Advisory | |
| CPE | cpe:2.3:a:algolia:algoliasearch-helper:*:*:*:*:*:node.js:*:* |
27 Sep 2025, 05:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-09-27 05:15
Updated : 2025-10-03 18:27
NVD link : CVE-2025-3193
Mitre link : CVE-2025-3193
CVE.ORG link : CVE-2025-3193
JSON object : View
Products Affected
algolia
- algoliasearch-helper
CWE
CWE-1321
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')