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TI-2026-17329 Aliases CVE-2026-21445GHSA-c5cp-vx83-jhqx

Langflow Missing Authentication on Critical API Endpoints

Priority HIGH 71CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.33289 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed langflow (langflow-ai): 1.7.0.dev45langflow-base (PyPI): 0.7.1+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Langflowlangflowbefore 1.7.0.dev451.7.0.dev45Patch availableCNA
—langflow-base (PyPI)before 0.7.10.7.1Patch availableGHSA-c5cp-vx83-jhqx
—langflow (PyPI)before 1.7.11.7.1Patch availableGHSA-c5cp-vx83-jhqx
  • langflow VendorLangflow Affected before 1.7.0.dev45 Fixed in 1.7.0.dev45 Patch available CNA
  • langflow-base (PyPI) Vendor— Affected before 0.7.1 Fixed in 0.7.1 Patch available GHSA-c5cp-vx83-jhqx
  • langflow (PyPI) Vendor— Affected before 1.7.1 Fixed in 1.7.1 Patch available GHSA-c5cp-vx83-jhqx

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*before 1.7.1VulnerableLangflow
  • cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:* Versions before 1.7.1 Vulnerable ·Langflow

Remediation

  • Fix · CNA langflow (langflow-ai) Fixed in 1.7.0.dev45
  • Fix · GHSA-c5cp-vx83-jhqx langflow-base (PyPI) Fixed in 0.7.1 Advisory →
  • Fix · GHSA-c5cp-vx83-jhqx langflow (PyPI) Fixed in 1.7.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-21445
  2. 2026-10-03 Alias added: GHSA-c5cp-vx83-jhqx

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2026-08085 Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-00553 Langflow exec_globals Inclusion of Functionality from Untrusted Control Sphere Remote… KEVCVSS 3.0CRITICAL 9.8
  • TI-2025-24427 Langflow <= 1.6.9 CORS Misconfiguration to Token Hijack & RCE KEVCVSS 4.0CRITICAL 9.4
  • TI-2025-02845 Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-25463 Langflow has Unauthenticated Remote Code Execution via Public Flow Build Endpoint KEVCVSS 4.0CRITICAL 9.3
  • TI-2026-39928 Authorization bypass in langflow KEVCVSS 3.1HIGH 8.4
See all 216 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences