---
cve: "CVE-2026-23891"
severity: "CRITICAL"
cvss: 9.3
epss: "36%"
vendor: "decidim"
kev: false
exploited: false
published: "2026-04-13 17:16:28"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-14T21:43:14+02:00"
---

# CVE-2026-23891

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |

## Patch verfügbar (OSV)

- ed4d23c283cb03d3423493aeb5a7860bc8f5bfa3 (Commit)
- 0a9443ed804ee6274fab904878bc0103af1c0f69 (Commit)

## Referenzen

- <https://github.com/decidim/decidim/security/advisories/GHSA-fc46-r95f-hq7g>
- <https://github.com/decidim/decidim/releases/tag/v0.30.5>
- <https://github.com/decidim/decidim/releases/tag/v0.31.1>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-23891) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_