CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2026-27966
Critical (9.8) in langflow langflow. EPSS 35% chance of exploitation in the next 30 days.
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.8.0, the CSV Agent node in Langflow hardcodes `allow_dangerous_code=True`, which automatically exposes LangChain’s Python REPL tool (`python_repl_ast`). As a result, an attacker can execute arbitrary Python and OS commands on the server via prompt injection, leading to full Remote Code Execution (RCE). Version 1.8.0 fixes the issue.
Severity
- EPSS
- 35% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)
- CWE
- CWE-94
- Published
- Modified
- Record from
- the NVD, synced
Affected
- langflow:langflow
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-3645-fxcv-hqr4 | PyPI | langflow | <=1.8.0rc2 | no fix published |
| PYSEC-2026-376 | PyPI | langflow | <=1.8.0rc2 | no fix published |