Vulnerability · Published Aug 6, 2026 · Assigned by GitHub_M

CVE-2026-45414Decidim: JWT-backed authentication can be replayed across organizations

High 8.5

In plain English

A high-severity authorization bypass via user-controlled key in decidim from decidim. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.5High

Exploit odds (30 days)0.5%top 60.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
RubyGems	decidim	0.31.5	GHSA-r3v7-5x4c-c69q
RubyGems	decidim	0.32.0	GHSA-r3v7-5x4c-c69q

Affected products (as reported)

Vendor	Product	Versions
decidim	decidim	< 0.31.5>= 0.32.0.rc1, < 0.32.0.rc2

Weakness: CWE-639, CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

References

https://github.com/decidim/decidim/security/advisories/GHSA-r3v7-5x4c-c69q x_refsource_CONFIRM
https://github.com/decidim/decidim/commit/023e206127c984a501345676e4789b31ddd115a1 x_refsource_MISC
https://github.com/decidim/decidim/commit/226dc94894e6a3c030e4638c8b3441ee7199643c x_refsource_MISC
https://github.com/decidim/decidim/releases/tag/v0.31.5 x_refsource_MISC
https://github.com/decidim/decidim/releases/tag/v0.32.0.rc2 x_refsource_MISC