CVE-2026-8505

CRITICAL

Authentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution

Title source: cna
STIX 2.1

Description

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).

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
https://www.ibm.com/support/pages/node/7278921

Scores

CVSS v3 9.8
EPSS 0.0056
EPSS Percentile 43.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-306
Status published
Products (2)
IBM/Langflow OSS 1.0.0 - 1.10.0
langflow/langflow 1.0.0 - 1.10.1
Published Jul 17, 2026
Tracked Since Jul 18, 2026