CriticalVulnerability
CVE-2026-21445: Langflow missing authentication on API endpoints exposes user data
- Source
- NVD(opens in a new tab)
- Identifier
- CVE-2026-21445
- Published
- Record updated
- Affected
- langflow-base <= 0.6.9, fixed in 0.7.1, released December 19, 2025, 15 days before disclosure
- langflow <= 1.7.0.dev44, fixed in 1.7.1, released December 19, 2025, 15 days before disclosure
- Known exploitation
- Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
- EPSS
- 33.3%
Summary
Prior to version 1.7.0.dev45, multiple critical API endpoints in Langflow, a tool for building and deploying AI-powered agents and workflows, lack authentication controls. Any unauthenticated user can read sensitive user conversation data and transaction histories and delete messages, including through endpoints that handle personal data and system operations.
Mitigation
Version 1.7.0.dev45 contains a patch.
Affected packages in the Exposure Registry
Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.
- langflowPyPIReaches an LLM package through dependencies
- langflow-basePyPILLM dependency since 2024-04-01 · 1 tracked dependent
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