CVE-2026-45572: Decidim

Medium severity, CVSS 4.8. EPSS: 0.3% chance of exploitation in the next 30 days.

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, an administrator with landing-page editing privileges can store arbitrary HTML and JavaScript in an HTML content block, which Decidim::ContentBlocks::HtmlCell#html_content renders without sanitization, causing the script to execute in visitors' browsers. This issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.

Affected products

• Decidim Decidim: before 0.30.9 (fixed in 0.30.9); from 0.31.0.rc1, before 0.31.5 (fixed in 0.31.5); from 0.32.0.rc1, before 0.32.0 (fixed in 0.32.0)

Published 2026-08-06. Last modified 2026-09-08.