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TI-2026-33169 Aliases CVE-2026-45378GHSA-3mvf-82qp-8qh5

Decidim: Verification documents can be downloaded through reusable links

Priority HIGH 72CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

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 identity-document verification admin UI embeds verification_attachment blobs through reusable signed Active Storage disk URLs, allowing anyone who obtains a URL to download the scanned document without an authenticated Decidim session until the signature expires. Verification-document images are rendered with variant_url(...), which produces signed /rails/active_storage/disk/... links instead of routing the file through an authorization-checking controller. Because Decidim configures Active Storage service URLs to remain valid for seven days, the URL itself becomes the credential for that period. The affected files are verification_attachment blobs on Decidim::Authorization, and the admin review pages embed those signed URLs directly into the HTML for pending and confirmation views. This issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00416 36th percentileScored 2026-11-07
Fix Fixed decidim (decidim): 0.30.9, 0.31.5, 0.32.0decidim-verifications (RubyGems): 0.30.9, 0.31.5, 0.32.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
decidimdecidimbefore 0.30.9; 0.31.0.rc1 to before 0.31.5; 0.32.0.rc1 to before 0.32.00.30.9, 0.31.5, 0.32.0Patch availableCNA
—decidim-verifications (RubyGems)before 0.30.90.30.9Patch availableGHSA-3mvf-82qp-8qh5
—decidim-verifications (RubyGems)0.31.0.rc1 to before 0.31.50.31.5Patch availableGHSA-3mvf-82qp-8qh5
—decidim-verifications (RubyGems)0.32.0.rc1 to before 0.32.00.32.0Patch availableGHSA-3mvf-82qp-8qh5
  • decidim Vendordecidim Affected before 0.30.9; 0.31.0.rc1 to before 0.31.5; 0.32.0.rc1 to before 0.32.0 Fixed in 0.30.9, 0.31.5, 0.32.0 Patch available CNA
  • decidim-verifications (RubyGems) Vendor— Affected before 0.30.9 Fixed in 0.30.9 Patch available GHSA-3mvf-82qp-8qh5
  • decidim-verifications (RubyGems) Vendor— Affected 0.31.0.rc1 to before 0.31.5 Fixed in 0.31.5 Patch available GHSA-3mvf-82qp-8qh5
  • decidim-verifications (RubyGems) Vendor— Affected 0.32.0.rc1 to before 0.32.0 Fixed in 0.32.0 Patch available GHSA-3mvf-82qp-8qh5

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:decidim:decidim:*:*:*:*:*:*:*:*——decidim
  • cpe:2.3:a:decidim:decidim:*:*:*:*:*:*:*:* Versions — — ·decidim

Remediation

  • Fix · CNA decidim (decidim) Fixed in 0.30.9, 0.31.5, 0.32.0
  • Fix · GHSA-3mvf-82qp-8qh5 decidim-verifications (RubyGems) Fixed in 0.30.9 Advisory →
  • Fix · GHSA-3mvf-82qp-8qh5 decidim-verifications (RubyGems) Fixed in 0.31.5 Advisory →
  • Fix · GHSA-3mvf-82qp-8qh5 decidim-verifications (RubyGems) Fixed in 0.32.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45378
  2. 2026-10-03 Alias added: GHSA-3mvf-82qp-8qh5

References

Other 3

  • TI-2025-40203 Decidim's private data exports can lead to data leaks CVSS 4.0HIGH 8.2
  • TI-2026-33203 Decidim: JWT-backed authentication can be replayed across organizations CVSS 3.1HIGH 8.5
  • TI-2026-33168 Decidim: Private exports can be downloaded through reusable links CVSS 3.1MEDIUM 6.5
  • TI-2026-33204 Decidim: CSV census record endpoints improper authorization CVSS 3.1MEDIUM 6.0
  • TI-2026-33167 Decidim: Admin user search allows SQL injection through similarity-based sorting CVSS 3.1MEDIUM 5.5
  • TI-2026-32933 Decidim: Forms admin question editor lacks authorization CVSS 3.1MEDIUM 5.4
See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences