CVE-2026-6542: IBM Langflow OSS 1.0.0-1.8.4 flow_id Info Disclosure and Deletion
CVE-2026-6542 Published on April 30, 2026
Monitor API allows cross-user read of transaction logs and deletion of build data via flow_id
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.
Vulnerability Analysis
CVE-2026-6542 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is an Insecure Direct Object Reference / IDOR Vulnerability?
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CVE-2026-6542 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.
Products Associated with CVE-2026-6542
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Affected Versions
IBM Langflow OSS:- Version 1.0.0, <= 1.8.4 is affected.