| Component | Langflow |
| Severity | critical (CVSS 9.9) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| Published (NVD) | 2026-08-28 |
| Last modified | 2026-09-01 |
| Affected versions | langflow >= 1.0.0, < 1.11.2 |
| Fixed in | 1.11.2 |
| Weakness | CWE-95 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade Langflow to
1.11.2or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
Read more
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