GitHub Advisoryadvisory · npm

GHSA-529q-4j3p-7c5r algoliasearch-helper is vulnerable to Prototype Pollution in _merge()

MEDIUM Published 2025-09-27 Modified 2025-09-30 Official page ↗
Aliases
CVE-2025-3193
Ecosystem
npm
Packages
algoliasearch-helper
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-1321
Reviewed
2025-09-30

Affected packages

• npm algoliasearch-helper: >= 2.0.0-rc1, < 3.11.2 → fixed in 3.11.2

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. NOTE: This vulnerability is not exploitable in the default configuration of InstantSearch since searchParameters are not modifiable by users.

Related

Alias · CVE (1)

  • 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()… vulnerability

Weakness · CWE (1)

  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes weakness

References