Description
IBM Langflow OSS 1.0.0 through 1.11.5 An attacker who could submit custom component source code could bypass the static security scanner by crafting an annotated class-body assignment that resolved to a dangerous callable through alias tracking; the resolved value was never checked against the dangerous callable blocklist due to the logic error. If the crafted component reached the runtime execution path, the attacker could cause arbitrary operating system commands to execute on the server in-process, with the privileges of the running service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| IBM | Langflow OSS | 1.0.0 – ≤ 1.11.5 | — |
Advisories 2
- NCSC-2026-0392 Kwetsbaarheden verholpen in IBM Langflow OSS en IBM MQ Appliance NCSC-NL (Netherlands) · Sep 23, 2026
- WID-SEC-2026-3239 Langflow OSS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 14, 2026
References
- https://www.ibm.com/support/pages/node/7286666 vendor-advisory patch