CVE-2026-33017: Unauthenticated RCE in Langflow Public Flow Build

# CVE-2026-33017: Unauthenticated RCE in Langflow Public Flow Build

https://gcdradar.vercel.app/incidents/cve-2026-33017-unauthenticated-rce-in-langflow-public-flow-b · AIR-2026-0502 · closed 2026-03-17

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-03-17
- AI role: Attack on AI
- Products: Langflow
- CVE ids: CVE-2026-33017
- CVSS: 9.8

## Summary

Langflow contains an unauthenticated remote code execution vulnerability in its public flow build endpoint due to unsafe execution of attacker-controlled node definitions. A security advisory has been published with a patch available.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-03-20: CVE-2026-33017: Langflow is a tool for building and deploying AI-powered agents and workflows. (https://nvd.nist.gov/vuln/detail/CVE-2026-33017)
- 2026-03-17: CVE-2026-33017: Unauthenticated Remote Code Execution in Langflow via Public Flow Build Endpoint (https://github.com/advisories/GHSA-vwmf-pq79-vjvx)

## Sources

- 2026-03-17 GitHub Advisory Database: CVE-2026-33017: Unauthenticated Remote Code Execution in Langflow via Public Flow Build Endpoint https://github.com/advisories/GHSA-vwmf-pq79-vjvx
- 2026-03-20 NVD: CVE-2026-33017: Langflow is a tool for building and deploying AI-powered agents and workflows. https://nvd.nist.gov/vuln/detail/CVE-2026-33017

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.