CVE-2026-48520: Langflow arbitrary local or S3 file read vulnerability

# CVE-2026-48520: Langflow arbitrary local or S3 file read vulnerability

https://gcdradar.vercel.app/incidents/cve-2026-48520-langflow-arbitrary-local-or-s3-file-read-vuln · AIR-2026-0750 · closed 2026-06-16

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-06-16
- AI role: Attack on AI
- Products: Langflow
- CVE ids: CVE-2026-48520
- CVSS: 6.1

## Summary

Langflow contained an arbitrary file-read vulnerability in its Shareable Playground feature allowing unauthenticated users to read local or S3 files. A patch has been provided by the maintainers.

## What to do

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

## Latest updates

- 2026-06-23: CVE-2026-48520: Langflow is a tool for building and deploying AI-powered agents and workflows. (https://nvd.nist.gov/vuln/detail/CVE-2026-48520)
- 2026-06-16: CVE-2026-48520: Langflow: Unauthenticated Shareable Playground arbitrary local or S3 file read (https://github.com/advisories/GHSA-rcjh-r59h-gq37)

## Sources

- 2026-06-16 GitHub Advisory Database: CVE-2026-48520: Langflow: Unauthenticated Shareable Playground arbitrary local or S3 file read https://github.com/advisories/GHSA-rcjh-r59h-gq37
- 2026-06-23 NVD: CVE-2026-48520: Langflow is a tool for building and deploying AI-powered agents and workflows. https://nvd.nist.gov/vuln/detail/CVE-2026-48520

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