CVE-2026-8505
Authentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution
- State
- Published
- Severity
- 9.8 Critical
- Published
- Jul 17, 2026
- Updated
- Jul 23, 2026
- Reserved
- May 13, 2026
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).
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | ibm |
Weaknesses
- CWE-306 Missing Authentication for Critical Function
Affected Products
| Product | Versions |
|---|---|
Langflow OSSIBM |
|
References
- https://www.ibm.com/support/pages/node/7278921vendor-advisorypatch
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