CVE-2026-40869
Description
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).
How to fix
- decidim decidim0.30.5, 0.31.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| decidim decidim | 0.19.0 ≤ v < 0.30.5, 0.31.0 ≤ v < 0.31.1 | 0.30.5, 0.31.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.