---
cve: "CVE-2026-33355"
severity: "MEDIUM"
cvss: 6.5
epss: "41%"
vendor: "discourse"
kev: false
exploited: false
published: "2026-03-19 22:16:42"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-16T12:38:43+02:00"
---

# CVE-2026-33355

> 6.5 MEDIUM · 🧪 PoC

## Beschreibung

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the `/private-posts` endpoint did not apply post-type visibility filtering, allowing regular PM participants to see whisper posts in PM topics they had access to. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 808b2ac23d8ff421563b40203091026732471c60 (Commit)
- f38464e46df1b8c51f7d60826502476908d6bb2b (Commit)

## Referenzen

- <https://github.com/discourse/discourse/security/advisories/GHSA-g4v5-6gfp-3hjq>
- <https://github.com/discourse/discourse/commit/84e5865a279716c6866e8c0648d1d8b42320603c>
- <https://github.com/discourse/discourse/commit/d25b8ee9ee182dbb34e92b34e39878ce4d59bcdc>
- <https://github.com/discourse/discourse/commit/d2f317271ad7638f1e2791905472ebd9370946d1>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-33355) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_