Description
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.
Published: 2025-09-27
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-31407 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.
Github GHSA Github GHSA GHSA-529q-4j3p-7c5r algoliasearch-helper is vulnerable to Prototype Pollution in _merge()
History

Sat, 04 Oct 2025 23:45:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P'}

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Fri, 03 Oct 2025 18:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:algolia:algoliasearch-helper:*:*:*:*:*:node.js:*:*

Tue, 30 Sep 2025 00:15:00 +0000

Type Values Removed Values Added
Title algoliasearch-helper: algoliasearch-helper prototype pollution
References
Metrics threat_severity

None

threat_severity

Moderate


Mon, 29 Sep 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 29 Sep 2025 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Algolia
Algolia algoliasearch-helper
Vendors & Products Algolia
Algolia algoliasearch-helper

Sat, 27 Sep 2025 05:15:00 +0000

Type Values Removed Values Added
Description 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.
Weaknesses CWE-1321
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P'}


Subscriptions

Algolia Algoliasearch-helper
cve-icon MITRE

Status: PUBLISHED

Assigner: snyk

Published:

Updated: 2025-10-04T23:33:59.390Z

Reserved: 2025-04-03T10:26:27.920Z

Link: CVE-2025-3193

cve-icon Vulnrichment

Updated: 2025-09-29T13:35:12.472Z

cve-icon NVD

Status : Modified

Published: 2025-09-27T05:15:30.253

Modified: 2025-10-05T00:15:31.013

Link: CVE-2025-3193

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-09-27T05:00:07Z

Links: CVE-2025-3193 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-09-29T09:29:48Z

Weaknesses