CVE-2026-9589

Missing authorization in the configuration cascade operations of the Collaboration Server in Unblu inc. Unblu Spark 7.0 through 8.36.1-hotfix.0, on on-premises and cloud deployments, allows an authenticated remote attacker to read and change configuration properties of entities they aren't authorized to access, including other users, other accounts and, in Unblu Cloud, other customers' accounts, via configuration read and write operations that target those entities. The Collaboration Server doesn't check whether the user reading or changing configuration has access to the entity the configuration belongs to. With certain non-default configuration validation settings, a registered user can additionally write configuration properties they aren't allowed to edit, in any scope. Exploitation requires an authenticated session but no user interaction.

CVSS

No CVSS.

References

Link	Resource
https://docs.unblu.com/latest/security-bulletins/#UBL-2026-002

Configurations

No configuration.

History

20 Oct 2026, 11:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-20 11:17

Updated : 2026-10-20 19:28

NVD link : CVE-2026-9589

Mitre link : CVE-2026-9589

CVE.ORG link : CVE-2026-9589

JSON object : View

Products Affected

No product.

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

CWE-862

Missing Authorization

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