Vulnerability in decidim-demographics (CVE-2026-45086)
Summary
Vulnerability in decidim-demographics (CVE-2026-45086). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 0.32.0 or later.
Original description
The description as published by the source.
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/sign_in.
Step 2. Request the admin-only editor directly. Open http://localhost:3000/admin/demographics/questions/edit_questions in the same browser.
Step 3. Add another question:
Note that access was denied when attempting to see question responses or settings.
Impact
- Low-privilege users can access questionnaire-admin interfaces.
- They can read question-management surfaces that should remain limited to questionnaire managers.
Patches
See https://github.com/decidim/decidim/pull/16665
Workarounds
Disable the "decidim-demographics" module
Reference
OWASP A01:2021 Broken Access Control
Credits
This issue was discovered in a security audit organized by the Decidim Association and made by Radically Open Security against Decidim financed by NGI.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-45086 has been found in decidim-demographics.
Risk of unauthorized operations or information disclosure. CVSS score: 5.4/10.
What to do: upgrade decidim-demographics to 0.32.0 or later.
If unsure, ask your IT team or search "decidim-demographics CVE-2026-45086" on the vendor's site.
CVE-2026-45086 (decidim-demographics) — CWE-284 / CVSS v3 5.4
Attack vector: remote (network-reachable) / no user interaction
Patched: 0.32.0 — apply immediately
Workaround: Disable the "decidim-demographics" module
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-284) exists in decidim-demographics.
Check the vendor advisory for the affected versions of decidim-demographics.
Severity: Medium (CVSS 5.4/10). Risk of unauthorized operations or information disclosure.
Update to 0.32.0.
Workaround: Disable the "decidim-demographics" module
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'decidim-demographics' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'decidim-demographics' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
decidim-demographicsを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply temporary workaround mitigate
Disable the "decidim-demographics" moduleパッチが適用されるまでの応急処置として、Disable the "decidim-demographics" module を実施。回避策の副作用 (機能低下) を確認した上で。
-
3Apply patch patch
Upgrade decidim-demographics to 0.32.0ステージング環境で 0.32.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
4Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- package github.com
- web github.com
- web github.com
- web github.com
- web security-advisories@github.com
- web security-advisories@github.com