Fonoster up to 0.22.7 Update Workspace createUpdateWorkspace.ts updateWorkspace privileges management

Summaryinfo

A vulnerability, which was classified as problematic, was found in Fonoster up to 0.22.7. Impacted is the function updateWorkspace of the file mods/identity/src/workspaces/createUpdateWorkspace.ts of the component Update Workspace Handler. The manipulation results in privileges management. This vulnerability was named CVE-2026-80209. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Fonoster up to 0.22.7. It has been classified as problematic. Affected is the function updateWorkspace of the file mods/identity/src/workspaces/createUpdateWorkspace.ts of the component Update Workspace Handler. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on integrity. CVE summarizes:

The updateWorkspace handler in mods/identity/src/workspaces/createUpdateWorkspace.ts in Fonoster through 0.22.7 invokes the gRPC callback with PERMISSION_DENIED when createIsWorkspaceMember reports that the caller is not a member of the target workspace, but it does not return. Execution continues into prisma.workspace.update, which is scoped by the workspace reference alone, so the rename commits before the second callback is issued and the caller receives a permission error for a write that already succeeded. The gRPC interceptor in mods/common/src/identity/createAuthInterceptor.ts binds the workspace accessKeyId to the caller's token only for paths in workspaceResourceAccess or workspaceResourceOwnerOrAdminAccess, and Identity/UpdateWorkspace is listed in fullIdentityAccess, which the base USER role holds. Any authenticated user can therefore rename an arbitrary workspace in the deployment.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-80209 since 08/26/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/27/2026). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Fonoster

Version

• 0.22.0
• 0.22.1
• 0.22.2
• 0.22.3
• 0.22.4
• 0.22.5
• 0.22.6
• 0.22.7

Website

• Product: https://github.com/fonoster/fonoster/

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