EUVD-2026-71226
GHSA-7jw5-c6mp-q4xf
Severity by source
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-exploitable but requires knowing victim object IDs (AC:H); authenticated low-privilege account required (PR:L); scope unchanged as all impact is within the same application instance.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
AppFlowy-Cloud 0.9.64 fails to verify that requested collab objects belong to the workspace in authorization checks, allowing attackers to access documents and database rows across workspaces. Attackers can supply a victim's object ID with their own workspace ID to bypass access controls and read, modify, or delete cross-workspace data.
AnalysisAI
Cross-workspace IDOR authorization bypass in AppFlowy-Cloud 0.9.64 allows authenticated users to read, modify, or delete documents and database rows belonging to other users' workspaces. The Casbin-based access control layer in libs/access-control/src/casbin/collab.rs validates a user's membership in their own workspace but fails to confirm that the requested collab object actually belongs to that workspace, enabling object ID substitution attacks across the HTTP API. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Attacker must hold a valid AppFlowy-Cloud account on the target instance (PR:L - authenticated, low privilege). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:H/AT:P/PR:L/UI:N) signals a network-exploitable vulnerability requiring authentication (PR:L) and specific attack prerequisites (AT:P, AC:H) - namely, the attacker must know or enumerate a victim's collab object ID. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No specific patched version has been confirmed in the available data at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all AppFlowy-Cloud 0.9.64 deployments to identify user accounts and workspaces at risk, and review API access logs for suspicious cross-workspace queries or modification attempts. …
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Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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