CVE-2026-33873
CRITICAL WAF: Medium
CVSS 9.9
Published: 2026-03-27
CWE-94
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.9.0, the Agentic Assistant feature in Langflow executes LLM-generated Python code during its validation phase. Although this phase appears intended to validate generated component code, the implementation reaches dynamic execution sinks and instantiates the generated class server-side. In deployments where an attacker can access the Agentic Assistant feature and influence the model output, this can result in arbitrary server-side Python execution. Version 1.9.0 fixes the issue.
WAF Coverage Analysis
Code Injection
Medium WAF Coverage
OWASP: A03:2021 Injection
932xxx - Remote Code Execution 933xxx - PHP Injection 934xxx - Node.js / Generic Injection
Affected Software
| Vendor | Product | Version |
|---|---|---|
| langflow | langflow | up to 1.9.0 |
References
- github.com (Product)
- github.com (Product)
- github.com (Product)
- github.com (Product)
- github.com (Product)
- github.com (Product)
- github.com (Product)
- github.com (Product)
- github.com (Product)
- github.com (Product)