CVSS 9.9 (critical) · published 2026-08-28
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.
Affected products (NVD): langflow langflow
Fixed in (NVD): 1.11.2
Weakness: CWE-95
Source: NVD CVE-2026-19295
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