---
cve: "CVE-2026-73090"
severity: "CRITICAL"
cvss: 9.3
epss: "0.2%"
vendor: "chocobozzz"
kev: false
exploited: false
published: "2026-08-11 17:19:30"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T04:14:05+02:00"
---

# CVE-2026-73090

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

PeerTube is an ActivityPub-federated video streaming platform. Prior to 8.2.2, processUpdateActivity and processUpdateVideo accept an ActivityPub Update containing a Video object without verifying that byActor.url is authorized for the host in videoObject.id, allowing a malicious federated server to rewrite another server's video metadata, visibility, media file, and HLS URLs. This issue is fixed in version 8.2.2.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 63d487d2a4a2a0e36af8c0ccb888cd23725bf7f2 (Commit)
- 296e63811479e55c8813a2691c3e577822800e22 (Commit)

## Referenzen

- <https://github.com/Chocobozzz/PeerTube/security/advisories/GHSA-g9p4-f7h8-hc86>
- <https://github.com/Chocobozzz/PeerTube/commit/63d487d2a4a2a0e36af8c0ccb888cd23725bf7f2>
- <https://github.com/Chocobozzz/PeerTube/releases/tag/v8.2.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-73090) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_