CVE-2026-55450: Langflow unauthenticated file upload leads to DoS and info leak

# CVE-2026-55450: Langflow unauthenticated file upload leads to DoS and info leak

https://gcdradar.vercel.app/incidents/cve-2026-55450-langflow-unauthenticated-file-upload-leads-to · AIR-2026-0776 · closed 2026-06-17

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-06-17
- AI role: Attack on AI
- Products: Langflow
- CVE ids: CVE-2026-55450
- CVSS: 9.3

## Summary

An unauthenticated file upload vulnerability in Langflow lets remote attackers exhaust server storage space. Additionally, error responses expose absolute server file paths to aid further attacks.

## What to do

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

## Latest updates

- 2026-06-23: CVE-2026-55450: Langflow is a tool for building and deploying AI-powered agents and workflows. (https://nvd.nist.gov/vuln/detail/CVE-2026-55450)
- 2026-06-17: CVE-2026-55450: Langflow: Unauthenticated file upload leads to DoS (space exhaustion) and information leak (https://github.com/advisories/GHSA-x223-p2gf-v735)

## Sources

- 2026-06-17 GitHub Advisory Database: CVE-2026-55450: Langflow: Unauthenticated file upload leads to DoS (space exhaustion) and information leak https://github.com/advisories/GHSA-x223-p2gf-v735
- 2026-06-23 NVD: CVE-2026-55450: Langflow is a tool for building and deploying AI-powered agents and workflows. https://nvd.nist.gov/vuln/detail/CVE-2026-55450

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