CVE-2026-45086

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 5.4 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:github_m
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: —CVSS: 5.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Decidim: Forms admin question editor lacks authorization

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.

CVSS v3
5.4
EG Score
5.4(low)
EPSS
—
KEV
Not listed

Published

July 13, 2026

Last Modified

July 13, 2026

Vendor Advisories for CVE-2026-45086(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 3× in last 7d / 3× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 13:13 UTCEG score recompute
  2. 2026-07-14 15:09 UTCEG score recompute
  3. 2026-07-13 17:08 UTCEG score recompute

Frequently asked(4)

What is CVE-2026-45086?
CVE-2026-45086 is a medium vulnerability published on July 13, 2026. Decidim: Forms admin question editor lacks authorization 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…
When was CVE-2026-45086 disclosed?
CVE-2026-45086 was first published in the National Vulnerability Database on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-45086?
CVE-2026-45086 has a CVSS v4.0 base score of 5.4 (CNA self-assessment; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-45086?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45086, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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