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TI-2026-33322 Aliases CVE-2026-45573GHSA-2g9c-vf8h-prxx

Decidim: Push subscriptions can be abused for server-side requests

Priority LOW 28CWE-918Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

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, when VAPID delivery is enabled, the notification subscription flow stores a client-supplied push endpoint without validating that it belongs to an approved push service, and SendPushNotification later passes that endpoint to WebPush.payload_send, allowing an authenticated user to create stored, mostly blind server-side requests to arbitrary reachable HTTPS endpoints. This issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0026 17th percentileScored 2026-11-07
Fix Fixed decidim (decidim): 0.30.9, 0.31.5, 0.32.0decidim-core (RubyGems): 0.30.9, 0.31.5, 0.32.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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-core (RubyGems)before 0.30.90.30.9Patch availableGHSA-2g9c-vf8h-prxx
—decidim-core (RubyGems)0.31.0.rc1 to before 0.31.50.31.5Patch availableGHSA-2g9c-vf8h-prxx
—decidim-core (RubyGems)0.32.0.rc1 to before 0.32.00.32.0Patch availableGHSA-2g9c-vf8h-prxx
  • 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-core (RubyGems) Vendor— Affected before 0.30.9 Fixed in 0.30.9 Patch available GHSA-2g9c-vf8h-prxx
  • decidim-core (RubyGems) Vendor— Affected 0.31.0.rc1 to before 0.31.5 Fixed in 0.31.5 Patch available GHSA-2g9c-vf8h-prxx
  • decidim-core (RubyGems) Vendor— Affected 0.32.0.rc1 to before 0.32.0 Fixed in 0.32.0 Patch available GHSA-2g9c-vf8h-prxx

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-2g9c-vf8h-prxx decidim-core (RubyGems) Fixed in 0.30.9 Advisory →
  • Fix · GHSA-2g9c-vf8h-prxx decidim-core (RubyGems) Fixed in 0.31.5 Advisory →
  • Fix · GHSA-2g9c-vf8h-prxx decidim-core (RubyGems) Fixed in 0.32.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45573
  2. 2026-10-03 Alias added: GHSA-2g9c-vf8h-prxx

References

Other 3

  • TI-2026-33169 Decidim: Verification documents can be downloaded through reusable links CVSS 3.1HIGH 7.5
  • 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
See all 28 →

Sources

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