Unauthorized Access Vulnerability in Langflow Tool by Langflow
CVE-2026-21445

8.8HIGH

Key Information:

Vendor

Langflow-ai

Status
Langflow
Vendor
CVE Published:
2 January 2026

What is CVE-2026-21445?

Langflow, a platform for creating AI-driven agents and workflows, has identified a serious security oversight where multiple API endpoints lack proper authentication controls. This vulnerability enables unauthorized users to access sensitive user conversation data, transaction histories, and execute destructive actions, including deleting messages. These insecure endpoints manage personal data and critical system operations that require strict authorization protocols. A fix has been implemented in version 1.7.0.dev45 to address these issues.

Affected Version(s)

langflow < 1.7.0.dev45

References

https://github.com/langflow-ai/langflow/security/advisori...
x_refsource_CONFIRM
https://github.com/langflow-ai/langflow/commit/3fed9fe1b5...
x_refsource_MISC

EPSS Score

6% chance of being exploited in the next 30 days.

CVSS V4

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.