PT-2026-51099

Name of the Vulnerable Software and Affected Versions Langflow versions prior to 1.9.1 Description An Insecure Direct Object Reference IDOR issue exists in the /api/v1/responses endpoint. This occurs because the get flow by id or endpoint name function queries the database using a flow ID without...

CVE-2026-34046 Langflow: Authenticated Users Can Read, Modify, and Delete Any Flow via Missing Ownership Check

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.5.1, the readflow helper in src/backend/base/langflow/api/v1/flows.py branched on the AUTOLOGIN setting to decide whether to filter by userid. When AUTOLOGIN was False i.e., authentication was enable...

CVE-2026-34046 Langflow: Authenticated Users Can Read, Modify, and Delete Any Flow via Missing Ownership Check

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.5.1, the readflow helper in src/backend/base/langflow/api/v1/flows.py branched on the AUTOLOGIN setting to decide whether to filter by userid. When AUTOLOGIN was False i.e., authentication was enable...

GHSA-8C4J-F57C-35CF Langflow: Authenticated Users Can Read, Modify, and Delete Any Flow via Missing Ownership Check

Vulnerability IDOR in GET/PATCH/DELETE /api/v1/flow/flowid The readflow helper in src/backend/base/langflow/api/v1/flows.py branched on the AUTOLOGIN setting to decide whether to filter by userid. When AUTOLOGIN was False i.e., authentication was enabled, neither branch enforced an ownership chec...

Missing Authorization

Overview langflow is an A Python package with a built-in web application Affected versions of this package are vulnerable to Missing Authorization due to improper authorization checks to verify flow ownership in uploadfile function in files.py file. To exploit this vulnerability, an attacker need...