| Component | Langflow |
| Severity | critical (CVSS 9.8) |
| CVSS vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Published (NVD) | 2026-01-23 |
| Last modified | 2026-06-17 |
| Affected versions | langflow = 1.3.2 |
| Fixed in | see the vendor advisory |
| Weakness | CWE-95 |
| CISA KEV | not listed |
NVD description
Langflow eval_custom_component_code Eval Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Authentication is not required to exploit this vulnerability. The specific flaw exists within the implementation of eval_custom_component_code function. The issue results from the lack of proper validation of a user-supplied string before using it to execute python code. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26972.
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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