| Component | Langflow |
| Severity | critical (CVSS 9.1) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| Published (NVD) | 2026-06-30 |
| Last modified | 2026-07-02 |
| Affected versions | langflow >= 1.0.0, < 1.10.0 |
| Fixed in | 1.10.0 |
| Weakness | CWE-285CWE-863 |
| CISA KEV | not listed |
NVD description
IBM Langflow OSS 1.0.0 through 1.9.6 could allow unauthenticated attackers to access protected MCP project resources and execute MCP operations due to improper authorization enforcement in the Streamable MCP transport endpoint.
What to do
- Upgrade Langflow to
1.10.0or 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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