---
id: CVE-2026-71204
title: >-
  changedetection.io's /settings save handler builds an update dict from
  form.data['application'] and blind-merges it into the stored application
  settings via .update.
summary: >-
  changedetection.io's /settings save handler builds an update dict from
  form.data['application'] and blind-merges it into the stored application
  settings via .update.
severity: medium
cvss: 6.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L'
cwe:
  - CWE-284
published: '2026-08-05'
updated: '2026-08-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71204'
references:
  - url: 'https://github.com/dgtlmoon/changedetection.io'
    label: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
tags:
  - nvd
  - exploit-available
epss: 0.0032
epssPercentile: 0.22234
ingestedAt: '2026-08-10T12:39:48.261Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/Nel-droid/CVE-2026-71204-PoC'
  checkedAt: '2026-09-25T08:21:10.517Z'
exploitAvailable: true
---

## Overview

changedetection.io's /settings save handler builds an update dict from form.data['application'] and blind-merges it into the stored application settings via .update.

## Remediation

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