---
cve: "CVE-2026-70618"
severity: "MEDIUM"
cvss: 5.3
epss: "0.2%"
vendor: "Spacebar Server"
kev: false
exploited: false
published: "2026-08-05 20:17:17"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T06:28:54+02:00"
---

# CVE-2026-70618

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

Spacebar Server before commit 51da17c contains a missing authorization vulnerability that allows any authenticated user to enumerate complete guild membership by querying the GET /guilds/{guild_id}/roles/{role_id}/member-ids endpoint without guild membership verification. Attackers can exploit the unprotected route handler in the roles member-ids endpoint, which lacks permission checks present in sibling endpoints, to retrieve the full list of member user IDs for any guild on the instance using only a valid bearer token and a known guild ID.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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 | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 51da17cf19d476483ee44e5f832d1ebdcd844f88 (Commit)

## Referenzen

- <https://github.com/spacebarchat/server/security/advisories/GHSA-p5cf-7hg9-gf65>
- <https://github.com/spacebarchat/server/commit/51da17cf19d476483ee44e5f832d1ebdcd844f88>
- <https://www.vulncheck.com/advisories/spacebar-server-missing-authorization-via-member-ids-endpoint>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-70618) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_