CVE-2026-8859— Path Traversal in APIRequest Component via Content-Disposition Header
Possible ATT&CK Techniques 3AI
T1055 · Process Injection T1059 · Command and Scripting Interpreter T1068 · Exploitation for Privilege EscalationAffected 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-2026-8859
Vulnerability Information
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Vulnerability Title
Path Traversal in APIRequest Component via Content-Disposition Header
Source: CVE Program / CVE List V5
Vulnerability Description
IBM Langflow OSS 1.0.0 through 1.10.0 Langflow could allow an attacker to write arbitrary files to unintended locations due to improper input validation in the APIRequest component. A path traversal vulnerability exists when the "Save to File" feature is enabled, where filenames extracted from HTTP response Content-Disposition headers are not sanitized before being joined to the temporary directory path. An attacker controlling an external HTTP server can supply crafted filename values containing path traversal sequences (e.g., ../), enabling arbitrary file writes to locations accessible by the Langflow process.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
IBM Langflow OSS 路径遍历漏洞
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版本存在路径遍历漏洞，该漏洞源于APIRequest组件输入验证不当，“Save to File”功能启用时，HTTP响应Content-Disposition头中提取的文件名在与临时目录路径连接之前未被清理，可能导致攻击者通过特
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-2026-8859
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|---|
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Vendor Advisories for CVE-2026-8859 (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-2026-8635 | 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-2026-8505 | 9.8 CRITICAL | Authentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution |
| 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-2026-12946
Remote Code Execution in CUGA Component CodeAgent - CVE-2026-13444
Langflow is affected by remote code execution, denial of ser - CVE-2026-10700
Broken Access Control Vulnerabilities in Langflow 1.0.0 - 1. - CVE-2026-13435
Python Interpreter Sandbox Bypass Leading to Sensitive Data - CVE-2026-12942
Langflow is affected by path traversal due to multiple unaut
Same vendor: IBM
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IBM DevOps Deploy / IBM UrbanCode Deploy (UCD) is susceptibl - CVE-2026-11536
IBM WebSphere Application Server is affected by a remote cod - CVE-2026-12946
Remote Code Execution in CUGA Component CodeAgent - CVE-2026-13444
Langflow is affected by remote code execution, denial of ser - CVE-2024-25039
IBM Engineering Requirements Management DOORS and DOORS Web
Same weakness: CWE-22
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CubeWP Framework <= 1.1.30 - Unauthenticated Arbitrary File - CVE-2026-18352
User Access Manager <= 2.3.15 - Unauthenticated Arbitrary Fi - CVE-2026-67295
FreeRDP before 3.29.0 Path Traversal via drive redirection - CVE-2026-67309
Traefik v3.7.0 Path Traversal via RewriteTarget Authenticati - CVE-2026-15450
NEX-Forms <= 9.2.3 - Authenticated (Admin+) Arbitrary File
V. Comments for CVE-2026-8859
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