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TI-2026-39991 Aliases CVE-2026-55423GHSA-7hw8-6q6r-4276

Langflow: Logout button does not clear session

Priority MEDIUM 62CWE-613Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-613.

Summary

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.7.0, the logout button does not clear the session. The previous user stays logged in unless another user explicitly logs in. This vulnerability is fixed in 1.7.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00222 12th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed langflow (langflow-ai): 1.7.0langflow (PyPI): 1.7.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
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 1.7.01.7.0Patch availableCNA
—langflow (PyPI)before 1.7.01.7.0Patch availableGHSA-7hw8-6q6r-4276
  • langflow VendorLangflow Affected before 1.7.0 Fixed in 1.7.0 Patch available CNA
  • langflow (PyPI) Vendor— Affected before 1.7.0 Fixed in 1.7.0 Patch available GHSA-7hw8-6q6r-4276

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*before 1.7.0VulnerableLangflow
  • cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:* Versions before 1.7.0 Vulnerable ·Langflow

Remediation

  • Fix · CNA langflow (langflow-ai) Fixed in 1.7.0
  • Fix · GHSA-7hw8-6q6r-4276 langflow (PyPI) Fixed in 1.7.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-55423
  2. 2026-10-03 Alias added: GHSA-7hw8-6q6r-4276

References

Exploit 2

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