---
cve: "CVE-2026-50129"
severity: "HIGH"
cvss: 7.5
epss: "26%"
vendor: "mastodon"
kev: false
exploited: false
published: "2026-06-24 21:16:55"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-16T23:25:53+02:00"
---

# CVE-2026-50129

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.11, 4.4.18, and 4.3.24, a DoS can be triggered by (Uncaught Exception vulerability), due to missing exception handling in the math sanitizer. Malformed  nodes can result in a DoS of a whole server or targeted users services, depending on the type of action that includes the malformed nodes and the services interacting with it. This vulnerability is fixed in 4.5.11, 4.4.18, and 4.3.24.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 0748a5ff81b24e666ab10b8ee7fbc6f0362c8cb0 (Commit)
- 3555d595e2a6fcf425c73f783e8709b1e44c0872 (Commit)

## Referenzen

- <https://github.com/mastodon/mastodon/security/advisories/GHSA-qrgq-9fx2-vf2r>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-50129) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_