| Component | Langflow |
| Severity | high (CVSS 7.1) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |
| Published (NVD) | 2026-08-05 |
| Last modified | 2026-08-07 |
| Affected versions | langflow >= 1.0.0, < 1.11.0 |
| Fixed in | 1.11.0 |
| Weakness | CWE-639 |
| CISA KEV | not listed |
NVD description
IBM Langflow OSS 1.0.0 through 1.10.3 contain an authorization bypass vulnerability in the MemoryComponent that allows authenticated users to access chat history of other users via session_id collision. The MemoryComponent.retrieve_messages and store_message methods filter on session_id without validating flow_id or user_id ownership, enabling cross-user information disclosure through multiple authenticated API endpoints including /api/v1/run/*, /api/v1/responses, and /api/v2/workflow/*. This vulnerability only affects multi-user deployments with LANGFLOW_AUTO_LOGIN=False.
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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