CVE-2026-105699: Langflow Authenticated Cross-Project File Disclosure

# CVE-2026-105699: Langflow Authenticated Cross-Project File Disclosure

https://gcdradar.vercel.app/incidents/cve-2026-105699-langflow-authenticated-cross-project-file-di · AIR-2026-0245 · closed 2026-10-05

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-10-05
- AI role: Attack on AI
- Products: Langflow
- CVE ids: CVE-2026-105699
- CVSS: 7.1

## Summary

Langflow failed to properly authorize resource URIs supplied to project-scoped MCP connections. This allowed authenticated users to request files belonging to other projects or users.

## What to do

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

## Latest updates

- 2026-10-07: CVE-2026-105699: Langflow has Authenticated Cross-Project File Disclosure via Unscoped MCP Resource Handlers (https://github.com/advisories/GHSA-4hmc-cfm3-w43c)
- 2026-10-05: CVE-2026-105699: Langflow is a tool for building and deploying AI-powered agents and workflows. (https://nvd.nist.gov/vuln/detail/CVE-2026-105699)

## Sources

- 2026-10-05 NVD: CVE-2026-105699: Langflow is a tool for building and deploying AI-powered agents and workflows. https://nvd.nist.gov/vuln/detail/CVE-2026-105699
- 2026-10-07 GitHub Advisory Database: CVE-2026-105699: Langflow has Authenticated Cross-Project File Disclosure via Unscoped MCP Resource Handlers https://github.com/advisories/GHSA-4hmc-cfm3-w43c

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