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).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| IBM | Langflow OSS | 1.0.0 – ≤ 1.10.0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | langflow | >= 1.7.0, < 1.9.1 | 1.9.1 | GHSA-cf6m-vc3m-7cgm |
Advisories 2
- WID-SEC-2026-2410 IBM Langflow Desktop OSS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 4, 2026
- NCSC-2026-0251 Kwetsbaarheden verholpen in IBM Langflow OSS NCSC-NL (Netherlands) · Jul 21, 2026
References
- https://www.ibm.com/support/pages/node/7278921 vendor-advisory patch