CVE-2026-19295

CriticalCVSS 9.9/10Last modified Sep 1, 2026

Description

IBM Langflow OSS 1.0.0 through 1.11.1 allows an authenticated attacker to execute arbitrary operating system commands in the server process by saving a flow with a crafted type field value and triggering a build of a wrapper flow that references it. This allowed privilege escalation from "authenticated flow user" to arbitrary OS-level command execution under the server process identity, bypassing the LANGFLOW_ALLOW_CUSTOM_COMPONENTS=false policy control.

Metrics

CVSS 3.1 9.9/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-95

Affected software

Vendor	Product	Versions
IBM	Langflow OSS	>= 1.0.0, <= 1.11.1

References

https://www.ibm.com/support/pages/node/7284733Vendor Advisory

Timeline

Published: Aug 28, 2026
Last modified: Sep 1, 2026
NVD status: Analyzed

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