CVE-2026-69258

UNKNOWN 0.0

Flowise: Unauthenticated Property Injection into Flow Execution Context via Ungated `overrideConfig` Spread in Prediction API

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the unauthenticated POST /api/v1/prediction/:id endpoint accepted an overrideConfig object and unconditionally spread it into internal flowConfig and flowData objects in packages/server/src/utils/buildChatflow.ts and packages/server/src/utils/index.ts without checking apiOverrideStatus. This allowed unauthenticated attackers to inject arbitrary properties into the flow execution context of any public chatflow, overwrite values such as chatId, sessionId, and chatHistory, and control values resolved through $flow.* template variables consumed by flow nodes. This issue is fixed in version 3.1.3.

CWE	CWE-639 CWE-915
Vendor	flowiseai
Product	flowise
Published	Aug 4, 2026

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Affected Versions

FlowiseAI / Flowise

< 3.1.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6vh2-wg4h-4vwj github.com: https://github.com/FlowiseAI/Flowise/pull/6279 github.com: https://github.com/FlowiseAI/Flowise/commit/23b997ee5ef9e269b628bad0f56f1ecb86bd2fca github.com: https://github.com/FlowiseAI/Flowise/releases/tag/[email protected]