CVE-2026-69258: Flowise unauthenticated property injection in prediction API

# CVE-2026-69258: Flowise unauthenticated property injection in prediction API

https://gcdradar.vercel.app/incidents/cve-2026-69258-flowise-unauthenticated-property-injection-in · AIR-2026-0875 · closed 2026-08-04

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-08-04
- AI role: Attack on AI
- Products: Flowise
- CVE ids: CVE-2026-69258
- CVSS: 8.8

## Summary

An unauthenticated property injection vulnerability in Flowise allows attackers to inject arbitrary parameters into the execution context of public chatflows. This can result in session hijacking and cross-session data pollution.

## What to do

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

## Latest updates

- 2026-08-04: CVE-2026-69258: Flowise is a drag & drop user interface to build a customized large language model flow. (https://nvd.nist.gov/vuln/detail/CVE-2026-69258)
- 2026-08-04: CVE-2026-69258: Flowise: Unauthenticated Property Injection into Flow Execution Context via Ungated `overrideConfig` Spread in Prediction API (https://github.com/advisories/GHSA-6vh2-wg4h-4vwj)

## Sources

- 2026-08-04 GitHub Advisory Database: CVE-2026-69258: Flowise: Unauthenticated Property Injection into Flow Execution Context via Ungated `overrideConfig` Spread in Prediction API https://github.com/advisories/GHSA-6vh2-wg4h-4vwj
- 2026-08-04 NVD: CVE-2026-69258: Flowise is a drag & drop user interface to build a customized large language model flow. https://nvd.nist.gov/vuln/detail/CVE-2026-69258

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