| Component | Langflow |
| Severity | medium (CVSS 5.9) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L |
| Published (NVD) | 2026-08-05 |
| Last modified | 2026-08-06 |
| Affected versions | langflow >= 1.0.0, < 1.11.0 |
| Fixed in | 1.11.0 |
| Weakness | CWE-284 |
| CISA KEV | not listed |
NVD description
IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate ownership in the deprecated POST /api/v1/build/{flow_id}/vertices endpoint, allowing an authenticated user to inject arbitrary graph data into a shared cache for any flow. This may result in cross-user cache pollution, unauthorized workflow execution, or denial of service.
What to do
- Upgrade Langflow to
1.11.0or 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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