GHSA-529Q-4J3P-7C5R

Vulnerability from github – Published: 2025-09-27 06:30 – Updated: 2025-09-30 20:54
VLAI?
Summary
algoliasearch-helper is vulnerable to Prototype Pollution in _merge()
Details

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.

Severity ?
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "algoliasearch-helper"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0-rc1"
            },
            {
              "fixed": "3.11.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-3193"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1321"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-09-30T20:54:39Z",
    "nvd_published_at": "2025-09-27T05:15:30Z",
    "severity": "MODERATE"
  },
  "details": "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.\n\nThis is related to but distinct from the issue reported in [CVE-2021-23433](https://security.snyk.io/vuln/SNYK-JS-ALGOLIASEARCHHELPER-1570421).\n\n**NOTE:** This vulnerability is not exploitable in the default configuration of InstantSearch since searchParameters are not modifiable by users.",
  "id": "GHSA-529q-4j3p-7c5r",
  "modified": "2025-09-30T20:54:39Z",
  "published": "2025-09-27T06:30:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-3193"
    },
    {
      "type": "WEB",
      "url": "https://github.com/algolia/algoliasearch-helper-js/issues/922"
    },
    {
      "type": "WEB",
      "url": "https://github.com/algolia/algoliasearch-helper-js/commit/776dff23c87b0902e554e02a8c2567d2580fe12a"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/algolia/algoliasearch-helper-js"
    },
    {
      "type": "WEB",
      "url": "https://security.snyk.io/vuln/SNYK-JS-ALGOLIASEARCHHELPER-3318396"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "algoliasearch-helper is vulnerable to Prototype Pollution in _merge()"
}


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