CVE-2026-33873CWE-94

Langflow has Authenticated Code Execution in Agentic Assistant Validation

Critical · published March 27, 2026

CVSS v4.0
9.3
EPSS
2%
Percentile
78.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
EPSS
0.01816 · 78.5th percentile
Weakness
CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2026-03-27T20:04Z
EPSS history
Timeline
  • 27 MAR 20:04Z
    Langflow has Authenticated Code Execution in Agentic Assistant Validation
    cvelistv5