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CVE-2026-8505— Authentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution

Quick assessment

Affected
IBM Langflow OSS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IBM Langflow OSS是美国IBM公司的一个开源的低代码可视化AI工作流构建工具，它让开发者能通过拖拽组件的方式快速搭建、部署和迭代AI智能体与RAG应用，同时支持用Python进行深度定制以集成企业系统。 IBM Langflow OSS 1.0.0版本至1.10.0版本存在安全漏洞，该漏洞源于webhook认证逻辑问题，当WEBHOOK_AUTH_ENABLE配置设置为False（默认设置）时，系统错误地绕过API密钥验证，导致未经身份验证的攻击者知晓flow的UUID后即可触发执行任意流程

CVSS 9.8 · Critical EPSS 1.04% · P62

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
IBM Langflow OSS 1.0.0≤ 1.10.0 affected
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I. Basic Information for CVE-2026-8505

Vulnerability Information
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Vulnerability Title
Authentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution
Source: CVE Program / CVE List V5
Vulnerability Description
IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system incorrectly bypasses API key validation when the WEBHOOK_AUTH_ENABLE configuration is set to False (which is the default setting). This allows a remote attacker who knows a flow's UUID to execute it as if they were the owner, potentially leading to Remote Code Execution (RCE).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
IBM Langflow OSS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM Langflow OSS是美国IBM公司的一个开源的低代码可视化AI工作流构建工具，它让开发者能通过拖拽组件的方式快速搭建、部署和迭代AI智能体与RAG应用，同时支持用Python进行深度定制以集成企业系统。 IBM Langflow OSS 1.0.0版本至1.10.0版本存在安全漏洞，该漏洞源于webhook认证逻辑问题，当WEBHOOK_AUTH_ENABLE配置设置为False（默认设置）时，系统错误地绕过API密钥验证，导致未经身份验证的攻击者知晓flow的UUID后即可触发执行任意流程
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
IBM Langflow OSS 1.0.0 ~ 1.10.0 cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-8505

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III. Intelligence Information for CVE-2026-8505

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Vendor Advisories for CVE-2026-8505 (1)

Same Patch Batch · IBM · 2026-07-17 · 34 CVEs total

CVE-2026-9135 9.9 CRITICAL Policies Component Dynamic CodeInput Fields Bypass Custom Component Validation
CVE-2026-8859 9.9 CRITICAL Path Traversal in APIRequest Component via Content-Disposition Header
CVE-2026-8635 9.9 CRITICAL Arbitrary Code Execution in Python Interpreter Component
CVE-2026-8481 9.9 CRITICAL Remote Code Execution via Code Validation Endpoint
CVE-2026-8476 9.9 CRITICAL Disk Cache Deserialization Remote Code Execution Vulnerability
CVE-2026-13446 9.8 CRITICAL Langflow is affected by remote code execution, denial of service, path traversal, and expo
CVE-2026-9202 9.8 CRITICAL Unauthenticated User Registration Could Lead to Remote Code Execution
CVE-2026-9198 9.8 CRITICAL Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation
CVE-2026-9103 9.8 CRITICAL Unauthenticated Superuser Token Issuance via Auto-Login Endpoint
CVE-2026-15091 9.3 CRITICAL Multiple Vulnerabilities in IBM Engineering AI hub.
CVE-2026-7667 8.8 HIGH Path Traversal Vulnerability in API Request Component Content-Disposition Header Processin
CVE-2026-8056 8.8 HIGH Parameter Injection Vulnerability in API Graph Execution Engine
CVE-2026-7755 8.8 HIGH MCP Server Configuration Validator Bypass via File Upload API
CVE-2026-14499 8.8 HIGH Langflow is affected by remote code execution, denial of service, path traversal, and expo
CVE-2026-13445 8.1 HIGH Langflow is affected by remote code execution, denial of service, path traversal, and expo
CVE-2026-13448 8.1 HIGH Langflow is affected by remote code execution, denial of service, path traversal, and expo
CVE-2026-13473 8.1 HIGH IBM Storage Protect Client is vulnerable to Heap-Based Buffer Overflow
CVE-2026-9762 7.8 HIGH IBM® Data Server driver for JDBC and SQLJ is vulnerable to remote code execution when jdbc
CVE-2026-7754 7.7 HIGH SSRF Protection Configuration Vulnerability
CVE-2026-7872 7.5 HIGH Path Traversal Vulnerability in File Component Leading to Arbitrary File Read and Authenti

Showing top 20 of 34 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Langflow OSS
Same vendor: IBM

V. Comments for CVE-2026-8505

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