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OpenAdvisories
Critical · 9.8 CVE-2026-7664 EUVD-2026-38281GHSA-4pf4-j777-cgmf

Unauthenticated Flow Execution via Webhook Endpoint in Langflow OSS

Published Jun 22, 2026 · Updated Jun 23, 2026 · Assigned by ibm

Vendor: IBM Product: Langflow OSS

Description

IBM Langflow OSS 1.0.0 through 1.8.4 could allow unauthenticated attackers to access protected MCP project resources and execute MCP operations due to improper authorization enforcement in the Streamable MCP transport endpoint.

Affected products

VendorProductAffectedFixed
IBM Langflow OSS 1.0.0 – ≤ 1.8.4 —

References