CVE-2025-3248 Langflow CVE debrief

Who should care

Langflow administrators, platform and cloud teams, application owners, and security teams responsible for any exposed or internet-reachable Langflow deployment.

Technical summary

The supplied corpus identifies CVE-2025-3248 as a missing authentication vulnerability in Langflow. CISA’s KEV entry indicates the issue is known to be exploited in the wild and directs affected users to apply vendor mitigations, follow BOD 22-01 guidance for cloud services where applicable, or discontinue use if mitigations are unavailable.

Defensive priority

Urgent. KEV inclusion means this issue should be prioritized ahead of routine patch work, especially for any deployment that is exposed to untrusted networks or used in production.

Recommended defensive actions

• Identify every Langflow deployment, including test, staging, and cloud-hosted instances.
• Apply vendor-provided mitigations as soon as possible; use the official CVE/NVD records to track any linked remediation guidance.
• If the product is hosted as a cloud service, follow applicable BOD 22-01 guidance.
• If effective mitigations are not available, discontinue use of the affected product until it can be secured.
• Verify that no Langflow instance is exposed without authentication or other compensating controls.
• Track remediation against the CISA KEV due date of 2025-05-26.

Evidence notes

CISA’s KEV feed lists CVE-2025-3248 as “Langflow Missing Authentication Vulnerability,” marks it as added on 2025-05-05, and sets a due date of 2025-05-26. The KEV notes also state that the issue affects a common open-source project and direct readers to the official CVE and NVD records.

Official resources