| Component | Langflow |
| Severity | critical (CVSS 9.8) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Published (NVD) | 2026-09-10 |
| Last modified | 2026-09-15 |
| Affected versions | langflow >= 1.0.0, < 1.11.6 |
| Fixed in | 1.11.6 |
| Weakness | CWE-863 |
| CISA KEV | not listed |
NVD description
IBM Langflow OSS 1.0.0 through 1.11.5 Langflow could allow an unauthenticated attacker to execute arbitrary code and access or modify chat sessions through publicly shared MCP project endpoints due to improper enforcement of public-flow security restrictions and session isolation controls.
What to do
- Upgrade Langflow to
1.11.6or 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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