---
id: CVE-2026-106550
title: >-
  Mozilla's Node-convict (version 6.2.2 and later) is vulnerable to a Denial of
  Service vulnerability caused by incomplete prototype‑pollution protections in
  config.set()
summary: >-
  Mozilla's Node-convict (version 6.2.2 and later) is vulnerable to a Denial of
  Service vulnerability caused by incomplete prototype‑pollution protections in
  config.set(). An attacker controlling the configuration key can write
  arbitrary p…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-915
  - CWE-1321
vendor: Mozilla
product: Node-convict
affected:
  - Node-convict 6.2.2
published: '2026-10-06'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T20:17:10.790'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106550'
references:
  - url: 'https://github.com/mozilla/node-convict'
    label: cret@cert.org
  - url: >-
      https://github.com/tomasilluminati/security-research/blob/main/CVE-2026-106550/README.md
    label: cret@cert.org
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106550.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-106550'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2547143'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-106550'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106550'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-07T15:05:14.037126Z'
ingestedAt: '2026-10-06T21:20:28.986Z'
epss: 0.00284
epssPercentile: 0.20763
---

## Overview

Mozilla's Node-convict (version 6.2.2 and later) is vulnerable to a Denial of Service vulnerability caused by incomplete prototype‑pollution protections in config.set(). An attacker controlling the configuration key can write arbitrary properties to constructor.<key>, which walk() resolves to the global Object function. This allows overwriting core JavaScript methods such as Object.assign, leading to persistent process-wide failures and requiring a restart. The issue bypasses existing filters that only block constructor.prototype.* and __proto__.*. Exploitation requires an endpoint that forwards attacker-controlled keys into config.set().

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat Build of Podman Desktop · no fix planned: Red Hat Build of Podman Desktop · updated 2026-10-07 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106550.json)