CVE-2026-19295
Critical
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.
SeverityCritical
CVSS9.9
Exploit probability—
Product
Langflow
PublishedAug 28, 2026
First seenAug 28, 2026
Weakness typeCWE-95CWE-95
How to fix
Update
- langflow langflow1.11.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| langflow langflow | 1.0.0 ≤ v < 1.11.2 | 1.11.2 |
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