Decidim is a participatory democracy framework. Starting in version 0.19.0 and prior to versions 0.30.5 and 0.31.1, a vulnerability allows any registered and authenticated user to accept or reject any amendments. The impact is on any users who have created proposals where the amendments feature is enabled. This also elevates the user accepting the amendment as the author of the original proposal as people amending proposals are provided coauthorship on the coauthorable resources. Versions 0.30.5 and 0.31.1 fix the issue. As a workaround, disable amendment reactions for the amendable component (e.g. proposals).
References
| Link | Resource |
|---|---|
| https://github.com/decidim/decidim/commit/1b99136a1c7aa02616a0b54a6ab88d12907a57a9 | Patch |
| https://github.com/decidim/decidim/security/advisories/GHSA-w5xj-99cg-rccm | Mitigation Patch Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
17 Jun 2026, 10:45
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/decidim/decidim/security/advisories/GHSA-w5xj-99cg-rccm - Mitigation, Patch, Vendor Advisory |
23 Apr 2026, 16:08
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/decidim/decidim/commit/1b99136a1c7aa02616a0b54a6ab88d12907a57a9 - Patch | |
| References | () https://github.com/decidim/decidim/security/advisories/GHSA-w5xj-99cg-rccm - Mitigation, Vendor Advisory, Patch | |
| First Time |
Decidim
Decidim decidim |
|
| CPE | cpe:2.3:a:decidim:decidim:*:*:*:*:*:ruby:*:* |
21 Apr 2026, 20:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-21 20:17
Updated : 2026-06-17 10:45
NVD link : CVE-2026-40869
Mitre link : CVE-2026-40869
CVE.ORG link : CVE-2026-40869
JSON object : View
Products Affected
decidim
- decidim
CWE
CWE-266
Incorrect Privilege Assignment
