CVE-2026-33017
CRITICAL CISA KEVCVSS v3
9.8
CRITICAL
EPSS Score
—
exploit probability
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
Description
Langflow is a tool for building and deploying AI-powered agents and workflows. In versions prior to 1.9.0, the POST /api/v1/build_public_tmp/{flow_id}/flow endpoint allows building public flows without requiring authentication. When the optional data parameter is supplied, the endpoint uses attacker-controlled flow data (containing arbitrary Python code in node definitions) instead of the stored flow data from the database. This code is passed to exec() with zero sandboxing, resulting in unauthe
CISA Known Exploited Vulnerability
- Date Added
- 3/25/2026
- Patch Due Date
- 4/8/2026
- Required Action
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 3/20/2026
- Last Modified
- 3/26/2026
Frequently Asked Questions
What is CVE-2026-33017?
Langflow is a tool for building and deploying AI-powered agents and workflows. In versions prior to 1.9.0, the POST /api/v1/build_public_tmp/{flow_id}/flow endpoint allows building public flows without requiring authentication. When the optional data parameter is supplied, the endpoint uses attacker-controlled flow data (containing arbitrary Python code in node definitions) instead of the stored flow data from the database. This code is passed to exec() with zero sandboxing, resulting in unauthe
Is CVE-2026-33017 actively exploited?
Yes. CVE-2026-33017 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 4/8/2026.
What is the CVSS score for CVE-2026-33017?
CVE-2026-33017 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string 3.1.
Is CVE-2026-33017 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.