---
id: "CVE-2026-112309"
kind: "vulnerability"
aliases: ["CVE-2026-112309"]
title: "@rvf/set-get: prototype pollution via form field lets attackers crash servers"
severity: "high"
cvss: 8.7
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["@rvf/core", "form-parsing", "node", "npm", "package"]
not_affected_if: ["@rvf/set-get-not-installed", "version-7.0.4-or-later"]
published_at: "2026-10-19T16:17:07+00:00"
first_seen_at: "2026-10-23T21:57:18+00:00"
updated_at: "2026-10-23T22:37:31+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112309", "first_seen_at": "2026-10-23T21:57:18+00:00"}]
---

# @rvf/set-get: prototype pollution via form field lets attackers crash servers

The @rvf/set-get npm package's setPath function lets an unauthenticated attacker overwrite built-in Object.prototype methods by submitting a form field named hasOwnProperty.call through @rvf/core. The overwrite persists process-wide and causes denial of service until the process restarts.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

Run npm ls @rvf/set-get and npm ls @rvf/core to see whether either is installed and at what version.
Any installed @rvf/set-get below 7.0.4 is affected.

## Fix

Upgrade @rvf/set-get to 7.0.4 or later and rebuild and redeploy.
Restart processes after upgrading, since a polluted process stays polluted until restart.

## Timeline

- 2026-10-23T21:57:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112309

## From the sources

@rvf/set-get before 7.0.4 contains a prototype pollution vulnerability in setPath that allows unauthenticated attackers to overwrite properties of shared built-in functions via inherited Object.prototype methods. Attackers can submit a form field named hasOwnProperty.call through @rvf/core form parsing to replace the shared function property, causing process-wide denial of service until restart.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_