| Component | Langflow |
| Severity | high (CVSS 8.2) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
| Published (NVD) | 2026-06-30 |
| Last modified | 2026-07-02 |
| Affected versions | langflow >= 1.0.0, <= 1.9.6 |
| Fixed in | see the vendor advisory |
| Weakness | CWE-287 |
| CISA KEV | not listed |
NVD description
IBM Langflow OSS 1.0.0 through 1.9.6 contains a missing authentication vulnerability in /api/v1/build_public_tmp/ endpoints that allows an unauthenticated attacker to read build event data or cancel jobs using a valid job identifier, resulting in information disclosure and denial of service.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep Langflow off the public internet until a fix ships.
- 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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