Vulnerability · Published Jul 31, 2026 · Assigned by GitHub_M

CVE-2026-45086Decidim: Forms admin question editor lacks authorization

Medium 5.4

In plain English

A medium-severity missing authorization in decidim from decidim. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.3%top 77.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Decidim is a participatory democracy framework. From 0.31.1 before 0.31.5 and in 0.32.0.rc1 before 0.32.0.rc2, a participant can directly load /admin/demographics/questions/edit_questions and reach the demographics questionnaire editor without the required administrator authorization. The demographics questionnaire editor should require admin access, but the route under /admin/demographics/questions renders the editor interface without checking whether the caller is an admin. A normal participant can load the page and see the live update form action, which proves the protected interface is reachable. This issue is fixed in versions 0.31.5 and 0.32.0.rc2.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
RubyGems	decidim-demographics	0.31.5	GHSA-vq6j-hj8w-7v39
RubyGems	decidim-demographics	0.32.0	GHSA-vq6j-hj8w-7v39

Affected products (as reported)

Vendor	Product	Versions
decidim	decidim	>= 0.31.1, < 0.31.5>= 0.32.0.rc1, < 0.32.0.rc2

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References

https://github.com/decidim/decidim/security/advisories/GHSA-vq6j-hj8w-7v39 x_refsource_CONFIRM
https://github.com/decidim/decidim/commit/fa52fb631a0788b30895d1312728a888607d81b5 x_refsource_MISC
https://github.com/decidim/decidim/commit/fc89301c6697c6101a7aed3fced3fa8311048cb9 x_refsource_MISC