Cross-tenant data disclosure via unscoped read queries
Published May 6, 2026 · Updated May 6, 2026
Improper authorization in Flowise through 3.0.12 allows remote authenticated users to read cross-tenant user and membership data. The user, organization-user, and workspace-user GET controllers pass attacker-selected identifiers to database reads without ownership or permission checks. A low-privilege account is sufficient to enumerate profiles, organization memberships, workspace memberships, and role identifiers across tenants.
Summary
What happened
Improper authorization in Flowise through 3.0.12 allows remote authenticated users to read cross-tenant user and membership data. The user, organization-user, and workspace-user GET controllers pass attacker-selected identifiers to database reads without ownership or permission checks. A low-privilege account is sufficient to enumerate profiles, organization memberships, workspace memberships, and role identifiers across tenants.
The record
- CVE
- CVE-2026-8027
- Published
- May 6, 2026
- Updated
- May 6, 2026
- Vendor
- FlowiseAI
- Product
- Flowise
- Classifications
- CWE-285, CWE-639, T1087
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 6, 2026CVE publishedPublication date reported by the CVE source.
- May 6, 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=3.0.0
- Affected versionversion=3.0.1
- Affected versionversion=3.0.10
- Affected versionversion=3.0.11
- Affected versionversion=3.0.12
- Affected versionversion=3.0.2
- Affected versionversion=3.0.3
- Affected versionversion=3.0.4
- Affected versionversion=3.0.5
- Affected versionversion=3.0.6
- Affected versionversion=3.0.7
- Affected versionversion=3.0.8
- Affected versionversion=3.0.9
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Cross-tenant read-endpoint IDOR proof of conceptfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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