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Public proof of conceptFix available

CVE-2025-3193

A public proof of concept exists; no exploitation attested.

  • Published2025-09-27
  • Fixed in3.11.2
  • WeaknessCWE-1321

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2025-09-2705:15CVE publishedNVD

Versions per branch

NVD · OSV
Algolia algoliasearch-helper
BranchAffectedFixed in
3.11≥ 2.0.0, < 3.11.23.11.2
3.11≥ 2.0.0-rc1, < 3.11.23.11.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As snyk, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • algoliasearch-helper
    Affected
    • ≥ 2.0.0-rc1, < 3.11.2fixed in 3.11.2semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-08-08

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2025-3193 Red Hat Product Security6 known affected

    algoliasearch-helper: algoliasearch-helper prototype pollution

    gatekeeper/gatekeeper-rhel9.src as a component of Gatekeeper 3 · openshift-logging/cluster-logging-operator-bundle.src as a component of Logging Subsystem for Red Hat OpenShift · openshift-logging/cluster-logging-rhel9-operator.src as a component of Logging Subsystem for Red Hat OpenShift · +3 more

Full record on NVD

Fix

  1. Update Algolia algoliasearch-helper to 3.11.2
  2. Workaround from the vendor Red Hat Product Security CVE-2025-3193 · 6 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
  3. No fix available, says the vendor Red Hat Product Security CVE-2025-3193 · 6 productsFix deferred

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionpoc2025-09-29
  • CNACVSS 3.17.5known since 2026-10-23
  • NVDCVSS 3.17.5read 2026-10-23
  • CISA-ADPweakness (CWE)CWE-13212025-09-29
  • CNAweakness (CWE)CWE-1321known since 2026-10-23
  • FIRST EPSSEPSS score0.5 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryMODERATE2025-09-30

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2025-09-27
Last Modified
2026-10-19
NVD status
Modified
GitHub Advisory
GHSA-529q-4j3p-7c5r

Frequently asked questions

What is 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() 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.

Is CVE-2025-3193 actively exploited?

A proof-of-concept exploit exists for CVE-2025-3193, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2025-3193?

CVE-2025-3193 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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