CVE-2026-6542: 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

IBM Langflow OSS (open-source software) versions 1.0.0 through 1.8.4 has a vulnerability where any user can view and delete other users' data by supplying a flow_id (a reference number for a workflow). This happens because the system doesn't properly check who should be allowed to access certain information, allowing unauthorized access to transaction logs and build data.