CVE-2026-8505— Authentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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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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
- CVE-2026-13445
Langflow is affected by remote code execution, denial of ser - CVE-2026-13446
Langflow is affected by remote code execution, denial of ser - CVE-2026-13448
Langflow is affected by remote code execution, denial of ser - CVE-2026-14499
Langflow is affected by remote code execution, denial of ser - CVE-2026-7667
Path Traversal Vulnerability in API Request Component Conten
Same vendor: IBM
- CVE-2026-3482
IBM Sterling B2B Integrator and IBM Sterling File Gateway Au - CVE-2026-13445
Langflow is affected by remote code execution, denial of ser - CVE-2026-13446
Langflow is affected by remote code execution, denial of ser - CVE-2026-13448
Langflow is affected by remote code execution, denial of ser - CVE-2026-13473
IBM Storage Protect Client is vulnerable to Heap-Based Buffe
V. Comments for CVE-2026-8505
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