CVE-2026-13448: Langflow

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

IBM Langflow OSS 1.0.0 through 1.10.1 Lanflow OSS contains an unauthenticated remote code execution vulnerability in the public flow build endpoint ( /api/v1/build_public_tmp/{flow_id}/flow ). The vulnerability stems from an incomplete denylist in the validate_public_flow_no_code_execution() function that fails to block several code-execution agent components including OpenDsStarAgent, CodeActAgentSmolagents, and CSVAgent.

Affected products

• Langflow Langflow: from 1.0.0, before 1.10.2 (fixed in 1.10.2)

Published 2026-07-17. Last modified 2026-07-23.