CVE-2026-8505
Published:July 17, 2026
Updated:October 13, 2026
IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system incorrectly bypasses API key validation when the WEBHOOK_AUTH_ENABLE configuration is set to False (which is the default setting). This allows a remote attacker who knows a flow's UUID to execute it as if they were the owner, potentially leading to Remote Code Execution (RCE).
Affected Packages
https://github.com/langflow-ai/langflow.git (GITHUB):
Affected version(s) >=1.0.16.dev20240826 <v1.9.1Fix Suggestion:
Update to version v1.9.1langflow-base (PYTHON):
Affected version(s) >=0.0.54 <0.9.1Fix Suggestion:
Update to version 0.9.1lfx (PYTHON):
Affected version(s) >=0.1.11 <0.4.1Fix Suggestion:
Update to version 0.4.1langflow (PYTHON):
Affected version(s) >=1.7.0 <1.9.1Fix Suggestion:
Update to version 1.9.1lfx-nightly (PYTHON):
Affected version(s) >=0.1.11.dev0 <0.5.0.dev10Fix Suggestion:
Update to version 0.5.0.dev10langflow-base-nightly (PYTHON):
Affected version(s) >=1.7.0.dev0 <1.10.0.dev10Fix Suggestion:
Update to version 1.10.0.dev10Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
EPSS
Base Score:
0.72