---
id: CVE-2026-63399
title: 'Coop: Unauthenticated org provisioning via GraphQL Mutation.createOrg'
summary: >-
  Coop is an open source review and moderation tool from ROOST. Prior to 1.0.0,
  the `GraphQL` `Mutation.createOrg` operation allows an unauthenticated actor
  to create arbitrary organizations on a publicly accessible instance. In
  addition t…
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-306
  - CWE-799
vendor: roostorg
product: coop
affected:
  - coop < 1.0.0
published: '2026-10-30'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T22:40:29.297Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-63399'
references:
  - url: 'https://github.com/roostorg/coop/security/advisories/GHSA-jcph-g6qv-g475'
    label: 'https://github.com/roostorg/coop/security/advisories/GHSA-jcph-g6qv-g475'
  - url: 'https://github.com/roostorg/coop/pull/699'
    label: 'https://github.com/roostorg/coop/pull/699'
  - url: >-
      https://github.com/roostorg/coop/commit/b29242f12f5acca0ac26116c30be9da77c15d93c
    label: >-
      https://github.com/roostorg/coop/commit/b29242f12f5acca0ac26116c30be9da77c15d93c
  - url: 'https://github.com/roostorg/coop/releases/tag/1.0.0'
    label: 'https://github.com/roostorg/coop/releases/tag/1.0.0'
tags:
  - cve.org
epss: 0.00285
epssPercentile: 0.21198
ingestedAt: '2026-11-05T16:24:31.484Z'
---

## Overview

Coop is an open source review and moderation tool from ROOST. Prior to 1.0.0, the `GraphQL` `Mutation.createOrg` operation allows an unauthenticated actor to create arbitrary organizations on a publicly accessible instance. In addition to creating noise in the logs, the lack of rate limiting could potentially lead to database exhaustion. Running the service on an authenticated private network prevents outside actors from directly querying the `GraphQL` API. This issue is fixed in version 1.0.0.

## Affected

- `coop < 1.0.0`

## Remediation

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