CVE-2026-45572: Decidim: HTML content blocks allow stored script execution

July 13, 2026

A privileged admin user who can edit an affected landing page can store arbitrary HTML/JavaScript in an HTML block, and the public page renders it with html_safe and no output escaping.

References

github.com/advisories/GHSA-533c-2vh9-4r86
github.com/decidim/decidim/pull/16451
github.com/decidim/decidim/security/advisories/GHSA-533c-2vh9-4r86
nvd.nist.gov/vuln/detail/CVE-2026-45572

Code Behaviors & Features

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