Decidim: Forms admin question editor lacks authorization

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.4 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS

• CVE-2026-45086: 0.29% estimated exploitation activity in the next 30 days; percentile 22.11 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Description A participant can load the demographics questionnaire admin editor and make changes. Technical description 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. Reproduction steps: Step 1. Sign in as a normal participant: Open http://localhost:3000/users/signin. Step 2. Request the admin-only editor directly. Open http://localhost:3000/admin/demographics/questions/editquestions in the same browser. Step 3. Add another question: <img width="1522" height="1174" alt="decidim-questions-01" src="https://github.com/user-attachments/assets/923f85d4-0e2f-4511-a9f3-a92f74dbf1d8" / Note that access was denied when attempting to see question responses or settings. Impact - Low-privilege users can access…

Published by the source

13 Jul 2026, 16:51 UTC

Last modified by the source

13 Jul 2026, 16:51 UTC

Source last checked

26 Oct 2026, 15:52 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-vq6j-hj8w-7v39

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# Patch Next advisory brief: CVE-2026-45086

Advisory: Decidim: Forms admin question editor lacks authorization
IDs: CVE-2026-45086, GHSA-vq6j-hj8w-7v39
Record: https://patchnext.com/advisories/cve-2026-45086 (revision 1, source checked 26 Oct 2026, 15:52 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.4)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: decidim-demographics 0.32.0, 0.31.5. A vendor fix does not mean a deployment is fixed.

## Affected components
- RubyGems decidim-demographics: affected >= 0.31.0, < 0.31.5; >= 0.32.0.rc1, < 0.32.0; fixed in 0.31.5, 0.32.0

## Suggested inspection (read-only)
- RubyGems decidim-demographics: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on decidim-demographics.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-vq6j-hj8w-7v39 (GitHub-reviewed advisory GHSA-vq6j-hj8w-7v39 lists affected ranges: RubyGems decidim-demographics >=0.31.0 =0.32.0.rc1 <0.32.0)

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