CVE-2026-63399
Coop: Unauthenticated org provisioning via GraphQL Mutation.createOrg
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
6.9
Coop: Unauthenticated org provisioning via GraphQL Mutation.createOrg
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.
- Record
CVE-2026-63399- CVSS 4.0
- 6.9 Medium
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 - Weakness
- CWE-306, CWE-799
- Updated
- 2026-11-06
EUVDEUVD-2026-114547
6.9
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.
- Record
EUVD-2026-114547- CVSS 4.0
- 6.9 Medium
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 - Updated
- 2026-11-06
NVD
6.9
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.
- Record
CVE-2026-63399- CVSS 4.0
- 6.9 Medium
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-306, CWE-799
- Updated
- 2026-11-06
OSV
6.9
Coop: Unauthenticated org provisioning via GraphQL Mutation.createOrg
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.
- Record
CVE-2026-63399- CVSS 4.0
- 6.9 Medium
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 - Weakness
- CWE-306, CWE-799
- Updated
- 2026-11-07
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| references | CVE List | |
| facts | NVD, OSV | |
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-63399 is a medium vulnerability (CVSS 6.9) in Roostorg Coop, published October 30, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. No source names a fixed version.
References
github.com/roostorg/coop/security/advisories/GHSA-jcph-g6qv-g475
github.com/roostorg/coop/pull/699
github.com/roostorg/coop/commit/b29242f12f5acca0ac26116c30be9da77c15d93c
github.com/roostorg/coop/releases/tag/1.0.0
github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63399.json
nvd.nist.gov/vuln/detail/CVE-2026-63399