Open Source Review Tool Vulnerability in ROOST
CVE-2026-63399

6.9MEDIUM

Key Information:

Vendor

Roostorg

Status
Coop
Vendor
CVE Published:
30 October 2026

What is CVE-2026-63399?

Roost's Coop, an open source review and moderation tool, contains a significant vulnerability in its GraphQL API prior to version 1.0.0. The 'Mutation.createOrg' operation allows an unauthenticated user to create arbitrary organizations on publicly accessible instances. This flaw not only clutters system logs but also lacks essential rate limiting, potentially leading to database exhaustion issues. To mitigate this vulnerability, it is recommended to operate the service within a secure authenticated private network and to update to version 1.0.0 or later.

Affected Version(s)

coop < 1.0.0

References

https://github.com/roostorg/coop/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/roostorg/coop/pull/699
x_refsource_MISC
https://github.com/roostorg/coop/commit/b29242f12f5acca0a...
x_refsource_MISC

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.