---
id: CVE-2026-70618
title: >-
  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 wit…
summary: >-
  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 wit…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-862
published: '2026-08-05'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T20:34:39.840'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70618'
references:
  - url: >-
      https://github.com/spacebarchat/server/commit/51da17cf19d476483ee44e5f832d1ebdcd844f88
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/spacebarchat/server/security/advisories/GHSA-p5cf-7hg9-gf65
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/spacebar-server-missing-authorization-via-member-ids-endpoint
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/spacebarchat/server/security/advisories/GHSA-p5cf-7hg9-gf65
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00331
epssPercentile: 0.2349
ingestedAt: '2026-09-16T21:05:36.834Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.