Cross-tenant publication via missing workspace authorization
Published Sep 10, 2026 · Updated Sep 10, 2026
Authorization bypass in AppFlowy Cloud 0.7.2 through 0.9.64 allows remote authenticated users to publish content in other tenants' workspaces. The bulk publish endpoint accepts a workspace-scoped path but does not verify that the authenticated caller belongs to that workspace before writing attacker-controlled views. Any ordinary authenticated account can place titles, bodies, and metadata on victim public pages, enabling defacement or phishing under a trusted namespace.
Summary
What happened
Authorization bypass in AppFlowy Cloud 0.7.2 through 0.9.64 allows remote authenticated users to publish content in other tenants' workspaces. The bulk publish endpoint accepts a workspace-scoped path but does not verify that the authenticated caller belongs to that workspace before writing attacker-controlled views. Any ordinary authenticated account can place titles, bodies, and metadata on victim public pages, enabling defacement or phishing under a trusted namespace.
The record
- CVE
- CVE-2026-88898
- Published
- Sep 10, 2026
- Updated
- Sep 10, 2026
- Vendor
- AppFlowy
- Product
- AppFlowy Cloud
- Classifications
- T1491.002
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 10, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.7.2 <=0.9.64
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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