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CVE-2026-69258— Flowise: Unauthenticated Property Injection into Flow Execution Context via Ungated `overrideConfig` Spread in Prediction API

Quick assessment

Affected
FlowiseAI Flowise
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FlowiseAI Flowise是FlowiseAI公司开源的一个用于轻松构建 LLM 应用程序的工具。 FlowiseAI Flowise 3.1.3之前版本存在安全漏洞，该漏洞源于未经验证的POST /api/v1/prediction/:id端点接受overrideConfig对象并无条件展开到内部flowConfig和flowData对象，未检查apiOverrideStatus，可能导致未认证攻击者向流执行上下文注入任意属性、覆盖chatId、sessionId和chatHistory等值，并

CVSS 8.8 · High EPSS 0.67% · P50

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
FlowiseAI Flowise < 3.1.3 affected
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I. Basic Information for CVE-2026-69258

Vulnerability Information
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Vulnerability Title
Flowise: Unauthenticated Property Injection into Flow Execution Context via Ungated `overrideConfig` Spread in Prediction API
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
FlowiseAI Flowise 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FlowiseAI Flowise是FlowiseAI公司开源的一个用于轻松构建 LLM 应用程序的工具。 FlowiseAI Flowise 3.1.3之前版本存在安全漏洞，该漏洞源于未经验证的POST /api/v1/prediction/:id端点接受overrideConfig对象并无条件展开到内部flowConfig和flowData对象，未检查apiOverrideStatus，可能导致未认证攻击者向流执行上下文注入任意属性、覆盖chatId、sessionId和chatHistory等值，并
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FlowiseAI Flowise < 3.1.3 -

II. Public POCs for CVE-2026-69258

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III. Intelligence Information for CVE-2026-69258

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Patches & Fixes for CVE-2026-69258 (2)

Vendor Advisories for CVE-2026-69258 (1)

Vendor Pages for CVE-2026-69258 (1)

Same Patch Batch · FlowiseAI · 2026-08-04 · 22 CVEs total

CVE-2026-70477 9.5 CRITICAL Flowise: CSV Agent Prompt Injection Remote Code Execution Vulnerability
CVE-2026-70470 9.5 CRITICAL Flowise: Pyodide validator Unicode homoglyph bypass leads to RCE
CVE-2026-69254 9.4 CRITICAL Flowise: RCE via NodeVM Sandbox Escape in executeJavaScriptCode() nodeVMOptions Override
CVE-2026-69259 9.4 CRITICAL Flowise RCE via SQLite Record Manager Node
CVE-2026-69256 9.4 CRITICAL Flowise: Remote Code Execution Vulnerability in CSVAgent
CVE-2026-69264 9.4 CRITICAL Flowise: RCE via CSVAgent csvFile data URI base64 segment is interpolated into Python sour
CVE-2026-70478 9.2 CRITICAL Flowise: Unauthenticated OAuth2 token refresh endpoint returns access tokens — enables tok
CVE-2026-69255 9.2 CRITICAL Flowise: CSV Agent Remote Code Execution via Pyodide Code Injection — Root Shell Verified
CVE-2026-69253 9.0 CRITICAL Flowise Sandbox Escape to RCE
CVE-2026-69251 9.0 CRITICAL Flowise RCE via TypeORM DataSource
CVE-2026-69263 8.7 HIGH Flowise: CVE-2025-8943 Patch Bypass: npm_config_yes bypasses MCP environment variable bloc
CVE-2026-69250 8.5 HIGH Flowise: Unauthenticated OAuth2 Refresh Enables Non-Blind SSRF and Secret Exfiltration
CVE-2026-70473 8.3 HIGH Flowise: Information Disclosure in GET /api/v1/upsert-history returns the entire server-wi
CVE-2026-70476 8.3 HIGH Flowise: Broken Access Control in Stripe Subscription Endpoints Allows Cross-Tenant Billin
CVE-2026-69257 7.6 HIGH Flowise: SSRF Protection Bypass via IPv4-Mapped IPv6 Addresses
CVE-2026-70474 7.6 HIGH Flowise: Cross-Workspace OAuth2 Credential Metadata Leak
CVE-2026-69252 7.2 HIGH Flowise: Missing authorization on `/api/v1/files` allows low-privileged API keys to list a
CVE-2026-69262 7.1 HIGH Flowise: `DELETE /api/v1/chatflows/:id` does not validate resource type, allowing `agentfl
CVE-2026-70471 7.1 HIGH Flowise: RBAC Bypass Leading to Unauthorized Workspace Variables Disclosure
CVE-2026-70472 7.1 HIGH Flowise: Cross-workspace credential IDOR in openai-assistants-vector-store

Showing top 20 of 22 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Flowise
Same vendor: FlowiseAI
Same weakness: CWE-639

V. Comments for CVE-2026-69258

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