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CVE-2026-80209— Fonoster through 0.22.7 Incorrect Authorization in the Identity UpdateWorkspace Handler

Quick assessment

Affected
fonoster fonoster
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Fonoster（版本至 0.22.7）中， 中的 处理函数存在一个漏洞。当 报告调用者不是目标工作区的成员时，该函数会调用返回 的 gRPC 回调，但没有直接返回（does not return）。执行流程继续进入 ，而该更新仅通过工作区引用进行作用域限定。因此，重命名操作在发出第二个回调之前就已经提交。最终，调用者会收到一个权限错误，但相应的写操作（重命名）实际上已经成功执行。 此外， 中的 gRPC 拦截器仅针对 或 中的路径，将工作区 绑定到调用者的令牌上。由于 被列在 中，而基础的 角色即拥有该权限。

CVSS 4.3 · Medium
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I. Basic Information for CVE-2026-80209

Vulnerability Information
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Vulnerability Title
Fonoster through 0.22.7 Incorrect Authorization in the Identity UpdateWorkspace Handler
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
fonoster fonoster 0 ~ 0.22.7 -

II. Public POCs for CVE-2026-80209

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III. Intelligence Information for CVE-2026-80209

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Vendor Advisories for CVE-2026-80209 (1)

Vendor Pages for CVE-2026-80209 (2)

Other References for CVE-2026-80209 (1)

IV. Related Vulnerabilities

Same product: fonoster
Same vendor: fonoster
Same weakness: CWE-863

V. Comments for CVE-2026-80209

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