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IBM Langflow OSS EUVD-2026-26447

| CVE-2026-6542 MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-04-30 ibm
6.5
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

5
Analysis Generated
Apr 30, 2026 - 22:01 vuln.today
EUVD ID Assigned
Apr 30, 2026 - 21:45 euvd
EUVD-2026-26447
Analysis Generated
Apr 30, 2026 - 21:45 vuln.today
Patch released
Apr 30, 2026 - 21:45 nvd
Patch available
CVE Published
Apr 30, 2026 - 21:16 nvd
MEDIUM 6.5

DescriptionNVD

IBM Langflow OSS 1.0.0 through 1.8.4 could allow any user to supply a flow_id to read transaction logs and vertex build data belonging to other users, and to delete persisted vertex build data for another user's flow.

AnalysisAI

IBM Langflow OSS 1.0.0 through 1.8.4 allows authenticated users to read transaction logs and vertex build data from other users' flows via direct flow_id manipulation, enabling unauthorized information disclosure and deletion of other users' persisted build data. The vulnerability requires valid user authentication (PR:L) but no additional complexity, affecting all deployments of affected versions.

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EUVD-2026-26447 vulnerability details – vuln.today

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