CVE-2026-23891
High
Description
Decidim is a participatory democracy framework. In versions below 0.30.5 and 0.31.0.rc1 through 0.31.0, a stored code execution vulnerability in the user name field allows a low-privileged attacker to execute arbitrary code in the context of any user who passively visits a comment page, resulting in high confidentiality and integrity impact across security boundaries. This issue has been fixed in versions 0.30.5 and 0.31.1.
SeverityHigh
CVSS8.7
Exploit probability—
ProductDecidim
PublishedApr 13, 2026
First seenApr 13, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- decidim decidim0.30.5, 0.31.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| decidim decidim | v < 0.30.5, 0.31.0 ≤ v < 0.31.1 | 0.30.5, 0.31.1 |
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