CVE-2026-45377 Details
Description
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 normal download_your_data flow requires the requester to be logged in as the export owner, but the resulting Active Storage blob redirect URL can be replayed without authentication by anyone who obtains it. This is because Decidim::DownloadYourDataController#download_file authenticates the export owner but redirects to a signed Active Storage blob URL that is no longer bound to the owner session. This issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.
A vulnerability exists in Decidim's download_your_data feature, specifically in versions prior to 0.30.9, from 0.31.0 before 0.31.5, and in 0.32.0.rc1 prior to 0.32.0.rc2. The issue arises because the Active Storage blob redirect URL, which is meant to be private, can be replayed without authentication by anyone who obtains it. This occurs because the download_file method in the DownloadYourDataController correctly verifies the export owner but then redirects to a signed Active Storage URL that is no longer tied to the user's session. As a result, anyone with access to the URL can download the file without authorization.
Users can update to Decidim versions 0.30.9, 0.31.5, or 0.32.0.rc2, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 31, 2026CISA-ADP
Assessed Jul 31, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/decidim/decidim/security/advisories/GHSA-767h-63j4-5226 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/decidim/decidim/pull/16680 | [email protected] | Source CodeVendor |
| https://github.com/decidim/decidim/security/advisories/GHSA-767h-63j4-5226 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
| CWE-284 | Improper Access Control | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Decidim | < 0.30.9 (semver) >= 0.31.0, < 0.31.5 (semver) >= 0.32.0.rc1, < 0.32.0.rc2 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 1, 2026 | CVE Modified | CISA-ADP |
| Jul 31, 2026 | New CVE Received | [email protected] |