---
id: CVE-2026-45573
title: Decidim is a participatory democracy framework
summary: >-
  Decidim is a participatory democracy framework. Prior to 0.30.9, from 0.31.0
  before 0.31.5, and in 0.32.0.rc1 before 0.32.0.rc2, when VAPID delivery is
  enabled, the notification subscription flow stores a client-supplied push
  endpoint wi…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-918
vendor: decidim-core
product: decidim-core
affected:
  - decidim-core < 0.30.9
  - 'decidim-core >= 0.31.0.rc1, < 0.31.5'
  - 'decidim-core >= 0.32.0.rc1, < 0.32.0'
patched:
  - decidim-core 0.30.9
  - decidim-core 0.31.5
  - decidim-core 0.32.0
published: '2026-08-06'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:51:43.490'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45573'
references:
  - url: 'https://github.com/decidim/decidim/pull/16714'
    label: security-advisories@github.com
  - url: 'https://github.com/decidim/decidim/security/advisories/GHSA-2g9c-vf8h-prxx'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-2g9c-vf8h-prxx'
tags:
  - nvd
  - ghsa
  - rubygems
epss: 0.00309
epssPercentile: 0.2389
aliases:
  - GHSA-2g9c-vf8h-prxx
ecosystem: rubygems
ingestedAt: '2026-07-13T17:27:58.901Z'
---

## Overview

Decidim is a participatory democracy framework. Prior to 0.30.9, from 0.31.0 before 0.31.5, and in 0.32.0.rc1 before 0.32.0.rc2, when VAPID delivery is enabled, the notification subscription flow stores a client-supplied push endpoint without validating that it belongs to an approved push service, and SendPushNotification later passes that endpoint to WebPush.payload_send, allowing an authenticated user to create stored, mostly blind server-side requests to arbitrary reachable HTTPS endpoints. This issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.

## Remediation

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

## Package advisory (CVE-2026-45573)

Affected packages:

- `decidim-core < 0.30.9`
- `decidim-core >= 0.31.0.rc1, < 0.31.5`
- `decidim-core >= 0.32.0.rc1, < 0.32.0`

Patched in:

- `decidim-core 0.30.9`
- `decidim-core 0.31.5`
- `decidim-core 0.32.0`

Source: https://github.com/advisories/GHSA-2g9c-vf8h-prxx