Decidim: JWT-backed authentication can be replayed across organizations
Priority HIGH 70CWE-639Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-639.
Summary
Decidim is a participatory democracy framework. Prior to 0.31.5 and in 0.32.0.rc1 before 0.32.0.rc2, JWT-backed API authentication is not bound to the organization selected by the current host, allowing a JWT issued for one tenant to be replayed against another tenant’s API to read participantDetails data and reach the proposal.answer mutation path. This issue is fixed in versions 0.31.5 and 0.32.0.rc2.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00454 39th percentileScored 2026-11-07
Fix Fixed decidim (decidim): 0.31.5, 0.32.0.rc2decidim (RubyGems): 0.31.5, 0.32.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| decidim | decidim | before 0.31.5; 0.32.0.rc1 to before 0.32.0.rc2 | 0.31.5, 0.32.0.rc2 | Patch available | CNA |
| — | decidim (RubyGems) | before 0.31.5 | 0.31.5 | Patch available | GHSA-r3v7-5x4c-c69q |
| — | decidim (RubyGems) | 0.32.0.rc1 to before 0.32.0 | 0.32.0 | Patch available | GHSA-r3v7-5x4c-c69q |
- decidim Vendordecidim Affected before 0.31.5; 0.32.0.rc1 to before 0.32.0.rc2 Fixed in 0.31.5, 0.32.0.rc2 Patch available CNA
- decidim (RubyGems) Vendor— Affected before 0.31.5 Fixed in 0.31.5 Patch available GHSA-r3v7-5x4c-c69q
- decidim (RubyGems) Vendor— Affected 0.32.0.rc1 to before 0.32.0 Fixed in 0.32.0 Patch available GHSA-r3v7-5x4c-c69q
Remediation
- Fix · CNA decidim (decidim) Fixed in 0.31.5, 0.32.0.rc2
- Fix · GHSA-r3v7-5x4c-c69q decidim (RubyGems) Fixed in 0.31.5 Advisory →
- Fix · GHSA-r3v7-5x4c-c69q decidim (RubyGems) Fixed in 0.32.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-45414
- 2026-10-03 Alias added: GHSA-r3v7-5x4c-c69q
References
Other 8
- https://github.com/decidim/decidim/security/advisories/GHSA-r3v7-5x4c-c69q
- https://github.com/decidim/decidim/commit/023e206127c984a501345676e4789b31ddd115a1
- https://github.com/decidim/decidim/commit/226dc94894e6a3c030e4638c8b3441ee7199643c
- https://github.com/decidim/decidim/releases/tag/v0.31.5
- https://github.com/decidim/decidim/releases/tag/v0.32.0.rc2
- https://github.com/decidim/decidim/pull/16673
- https://github.com/decidim/decidim/pull/16756
- https://github.com/decidim/decidim
More decidim vulnerabilities
- 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-2026-33168 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
Sources
- CVE-2026-45414 · CVE Program
- CVE-2026-45414 · NVD
- FIRST EPSS
- GHSA-r3v7-5x4c-c69q · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences