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CVE-2026-67621— Flowise 3.1.4 Missing Authorization on Document Store Mutation Endpoints

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公司开源的一款可视化编排语言模型应用流程的工具。 FlowiseAI Flowise 3.1.4及之前版本存在授权问题漏洞，该漏洞源于缺少授权验证，允许已认证的工作区成员通过访问未受保护的mutation端点执行未授权的文档存储操作，仅具有查看权限的攻击者可发送直接HTTP请求到upsert和refresh文档存储路由，触发文档摄取、刷新向量数据库内容、消耗embedding API额度并修改下游聊天流使用的知识库。

CVSS 7.6 · High EPSS 0.27% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
FlowiseAI Flowise ≤ 3.1.4 affected
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I. Basic Information for CVE-2026-67621

Vulnerability Information
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Vulnerability Title
Flowise 3.1.4 Missing Authorization on Document Store Mutation Endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
Flowise through 3.1.4 contains a missing authorization vulnerability that allows authenticated workspace members to perform unauthorized document store operations by accessing unprotected mutation endpoints. Attackers holding only view-level permissions can send direct HTTP requests to the upsert and refresh document store routes to trigger document ingestion, refresh vector database contents, consume embedding API credits, and modify knowledge bases used by downstream chatflows.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
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公司开源的一款可视化编排语言模型应用流程的工具。 FlowiseAI Flowise 3.1.4及之前版本存在授权问题漏洞，该漏洞源于缺少授权验证，允许已认证的工作区成员通过访问未受保护的mutation端点执行未授权的文档存储操作，仅具有查看权限的攻击者可发送直接HTTP请求到upsert和refresh文档存储路由，触发文档摄取、刷新向量数据库内容、消耗embedding API额度并修改下游聊天流使用的知识库。
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 0 ~ 3.1.4 -

II. Public POCs for CVE-2026-67621

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 7039 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-67621

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Vendor Advisories for CVE-2026-67621 (1)

Security Blog Posts for CVE-2026-67621 (1)

Other References for CVE-2026-67621 (1)

Same Patch Batch · FlowiseAI · 2026-08-06 · 3 CVEs total

CVE-2026-67622 9.9 CRITICAL Flowise 3.1.4 IDOR in OpenAI Assistants Integration
CVE-2026-70636 7.5 HIGH Flowise 3.1.4 Authentication Bypass via OAuth2 Credential Refresh Endpoint

IV. Related Vulnerabilities

Same product: Flowise
Same vendor: FlowiseAI
Same weakness: CWE-862

V. Comments for CVE-2026-67621

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