CVE-2026-70618
Spacebar Server Missing Authorization via member-ids Endpoint
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | spacebar server |
| Product | spacebar server |
| Published | Aug 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
Spacebar Server / Spacebar Server
0 ≤ 51da17cf19d476483ee44e5f832d1ebdcd844f88
References
github.com: https://github.com/spacebarchat/server/security/advisories/GHSA-p5cf-7hg9-gf65 github.com: https://github.com/spacebarchat/server/commit/51da17cf19d476483ee44e5f832d1ebdcd844f88 vulncheck.com: https://www.vulncheck.com/advisories/spacebar-server-missing-authorization-via-member-ids-endpoint
Credits
George Chen