High severityOSV Advisory· Published Jan 2, 2026· Updated Feb 26, 2026
Langflow Missing Authentication on Critical API Endpoints
CVE-2026-21445
Description
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.7.0.dev45, multiple critical API endpoints in Langflow are missing authentication controls. The issue allows any unauthenticated user to access sensitive user conversation data, transaction histories, and perform destructive operations including message deletion. This affects endpoints handling personal data and system operations that should require proper authorization. Version 1.7.0.dev45 contains a patch.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
langflow-basePyPI | < 0.7.1 | 0.7.1 |
langflowPyPI | < 1.7.1 | 1.7.1 |
Affected products
3- Range: 1.1.2, 1.1.3, 1.1.4, …
- ghsa-coords2 versions
< 1.7.1+ 1 more
- (no CPE)range: < 1.7.1
- (no CPE)range: < 0.7.1
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-c5cp-vx83-jhqxghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-21445ghsaADVISORY
- github.com/langflow-ai/langflow/commit/3fed9fe1b5658f2c8656dbd73508e113a96e486aghsax_refsource_MISCWEB
- github.com/langflow-ai/langflow/releases/tag/1.7.1ghsaWEB
- github.com/langflow-ai/langflow/security/advisories/GHSA-c5cp-vx83-jhqxghsax_refsource_CONFIRMWEB
News mentions
2- Path traversal flaw in AI dev platform Langflow exploited in attacksBleepingComputer · Jun 10, 2026
- Langflow Vulnerability CVE-2026-5027 Exploited for Unauthenticated RCEThe Hacker News · Jun 10, 2026