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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.

Fonoster是Fonoster组织开源的一个云通信平台。 Fonoster 0.22.7及之前版本存在授权问题漏洞，该漏洞源于updateWorkspace处理器在权限校验失败后未正确返回，导致执行继续，从而使任何经过身份验证的用户可以重命名任意工作区。

CVSS 4.3 · Medium EPSS 0.39% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
fonoster fonoster ≤ 0.22.7 affected
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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
Vulnerability Title
Fonoster 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fonoster是Fonoster组织开源的一个云通信平台。 Fonoster 0.22.7及之前版本存在授权问题漏洞，该漏洞源于updateWorkspace处理器在权限校验失败后未正确返回，导致执行继续，从而使任何经过身份验证的用户可以重命名任意工作区。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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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