github.com
https://github.com/decidim/decidim CVE-2026-45573
MEDIUM
Decidim: Push subscriptions can be abused for server-side requests
Record summary
CVE-2026-45573 has a selected CVSS score of 6.4 (medium).
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, 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.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationNone
AutomatableNo
Technical impactPartial
CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 8, 2026 · Source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
decidimBrowse decidim / decidim | CVE List | < 0.30.9 | affected |
| >= 0.31.0.rc1, < 0.31.5 | affected | ||
| >= 0.32.0.rc1, < 0.32.0 | affected | ||
decidim-coreBrowse RubyGems / decidim-core | GitHub Advisory | Before 0.30.9 · Fixed in 0.30.9 | affected |
| 0.31.0.rc1 to < 0.31.5 · Fixed in 0.31.5 | affected | ||
| 0.32.0.rc1 to < 0.32.0 · Fixed in 0.32.0 | affected |
References
3github.com
https://github.com/decidim/decidim/pull/16714 github.comConfirmation
https://github.com/decidim/decidim/security/advisories/GHSA-2g9c-vf8h-prxx