CVE-2026-41273: Flowise OAuth 2.0 Access Token Disclosure

# CVE-2026-41273: Flowise OAuth 2.0 Access Token Disclosure

https://gcdradar.vercel.app/incidents/cve-2026-41273-flowise-oauth-2-0-access-token-disclosure · AIR-2026-0571 · 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: Flowise
- CVE ids: CVE-2026-41273
- CVSS: 8.2

## Summary

Flowise contains an authentication bypass that enables unauthenticated attackers to retrieve OAuth 2.0 access tokens from public chatflows. Users are advised to update their installations.

## What to do

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

## Latest updates

- 2026-04-23: CVE-2026-41273: Flowise is a drag & drop user interface to build a customized large language model flow. (https://nvd.nist.gov/vuln/detail/CVE-2026-41273)
- 2026-04-16: CVE-2026-41273: Flowise: Unauthenticated OAuth 2.0 Access Token Disclosure via Public Chatflow in Flowise (https://github.com/advisories/GHSA-6f7g-v4pp-r667)

## Sources

- 2026-04-16 GitHub Advisory Database: CVE-2026-41273: Flowise: Unauthenticated OAuth 2.0 Access Token Disclosure via Public Chatflow in Flowise https://github.com/advisories/GHSA-6f7g-v4pp-r667
- 2026-04-23 NVD: CVE-2026-41273: Flowise is a drag & drop user interface to build a customized large language model flow. https://nvd.nist.gov/vuln/detail/CVE-2026-41273

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