---
cve: "CVE-2026-27021"
severity: "MEDIUM"
cvss: 6.9
epss: "0.3%"
vendor: "discourse"
kev: false
exploited: false
published: "2026-02-26 21:28:53"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T07:21:31+02:00"
---

# CVE-2026-27021

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, the voters endpoint in the poll plugin lacked post visibility checks which allowed unauthorized access to voters details of polls in any post. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 3e7317b3344cca6c6510a32cc4c5c0f540132ad9 (Commit)
- 8a2a8b7d3a494435949a12ad078b22509f54bd58 (Commit)

## Referenzen

- <https://github.com/discourse/discourse/security/advisories/GHSA-f5m5-9hpw-7c2g>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-27021) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_