---
cve: "CVE-2026-45078"
severity: "MEDIUM"
cvss: 6.8
epss: "13%"
vendor: "element-hq"
kev: false
exploited: false
published: "2026-05-28 17:16:31"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-19T11:43:45+02:00"
---

# CVE-2026-45078

> 6.8 MEDIUM · 🧪 PoC

## Beschreibung

Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- d97b5b9e21681792d78c5d58243fc483c664b66e (Commit)

## Referenzen

- <https://github.com/element-hq/synapse/security/advisories/GHSA-8q93-326v-3m7g>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-45078) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_