CVE-2026-41269: Flowise file upload validation bypass leads to RCE

# CVE-2026-41269: Flowise file upload validation bypass leads to RCE

https://gcdradar.vercel.app/incidents/cve-2026-41269-flowise-file-upload-validation-bypass-leads-t · AIR-2026-0568 · closed 2026-04-16

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-04-16
- AI role: Attack on AI
- Products: FlowiseAI
- CVE ids: CVE-2026-41269
- CVSS: 7.1

## Summary

FlowiseAI chatflow configurations failed to properly restrict JavaScript MIME types during file uploads. This allowed attackers to persistently store malicious web shells and achieve remote code execution.

## What to do

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

## Latest updates

- 2026-04-23: CVE-2026-41269: Flowise is a drag & drop user interface to build a customized large language model flow. (https://nvd.nist.gov/vuln/detail/CVE-2026-41269)
- 2026-04-16: CVE-2026-41269: Flowise: File Upload Validation Bypass in createAttachment (https://github.com/advisories/GHSA-rh7v-6w34-w2rr)

## Sources

- 2026-04-16 GitHub Advisory Database: CVE-2026-41269: Flowise: File Upload Validation Bypass in createAttachment https://github.com/advisories/GHSA-rh7v-6w34-w2rr
- 2026-04-23 NVD: CVE-2026-41269: Flowise is a drag & drop user interface to build a customized large language model flow. https://nvd.nist.gov/vuln/detail/CVE-2026-41269

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