Auth bypass in Decidim

CVE-2026-45415

Decidim is a participatory democracy framework. Prior to 0.30.9, from 0.31.0 before 0.31.5, and in 0.32.0.rc1 before 0.32.0.rc2, the /admin/csv_census/census_logs record-management endpoints do not enforce full administrator authorization before rendering or mutating Decidim::Verifications::CsvDatum, allowing a participant manager to create, alter, or remove census records. This issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L.

EPSS exploit prediction

EPSS: 0.004 (36.8th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-45415: held from 0.004 to 0.004.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

  • Decidim — versions < 0.30.9, >= 0.31.0.rc1, < 0.31.5, >= 0.32.0.rc1, < 0.32.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-45415?
CVE-2026-45415 is a medium-severity vulnerability in Decidim, classified under Missing Authorization. CVSS score: 6.0/10. Published 2026-08-06.
How severe is CVE-2026-45415?
Medium severity. CVSS v3 base score is 6.0 out of 10.