Vulnerability 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).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Decidim | Decidim | >= 0.19.0, < 0.30.5 |
Related Weaknesses (CWE)
References
- https://github.com/decidim/decidim/commit/1b99136a1c7aa02616a0b54a6ab88d12907a57Patch
- https://github.com/decidim/decidim/security/advisories/GHSA-w5xj-99cg-rccmMitigationVendor AdvisoryPatch
FAQ
What is CVE-2026-40869?
CVE-2026-40869 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2026-40869?
CVE-2026-40869 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40869?
Check the references section above for vendor advisories and patch information. Affected products include: Decidim Decidim.