{"id":"CVE-2026-45378","aliases":["GHSA-3mvf-82qp-8qh5"],"url":"https://o3.security/vulnerability/CVE-2026-45378","summary":"Decidim: Verification documents can be downloaded through reusable links","details":"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.","published":"2026-08-06T20:15:40.126Z","modified":"2026-09-10T03:30:22.796125547Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":{"score":0.00303,"percentile":0.23023,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"decidim-verifications","fixedVersion":"0.30.9"},{"ecosystem":"RubyGems","name":"decidim-verifications","fixedVersion":"0.31.5"},{"ecosystem":"RubyGems","name":"decidim-verifications","fixedVersion":"0.32.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45378.json"},{"type":"ADVISORY","url":"https://github.com/decidim/decidim/security/advisories/GHSA-3mvf-82qp-8qh5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45378"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T03:30:22.796125547Z"}}