Vulnerability details

CVE-2025-3193

algoliasearch-helper

CVSS 3.1

7.5High

Official 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.

CVSS scores

Score	Version	Source	Vector
7.5High	3.1	CVEProject cvelistV5 (CNA) (snyk)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

Affected products

Vendor	Product	Versions	Source
—	algoliasearch-helper	2.0.0-rc1 ≤ v < 3.11.2	CVEProject cvelistV5 (CNA)

References and advisories

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Details

Published: 2025-09-27
Last updated: 2026-08-08
State: Published
Assigner (CNA): snyk

Exploit prediction (EPSS)

0.51%

Probability of exploitation in 30 days

44.1%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Partial

Weaknesses (CWE)

CWE-1321
Prototype Pollution