CVE-2026-4502— Arbitrary File Write and Remote Code Execution Vulnerability in Langflow v2 API
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I. Basic Information for CVE-2026-4502
Vulnerability Information
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Vulnerability Title
Arbitrary File Write and Remote Code Execution Vulnerability in Langflow v2 API
Source: NVD (National Vulnerability Database)
Vulnerability Description
IBM Langflow Desktop 1.2.0 through 1.8.4 Langflow could allow an authenticated attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot" sequences (/../) to write arbitrary files on the system.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
IBM Langflow Desktop 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM Langflow Desktop是美国国际商业机器（IBM）公司的一款AI流程编排桌面应用。 IBM Langflow Desktop 1.2.0版本至1.8.4版本存在路径遍历漏洞，该漏洞源于目录遍历问题，可能导致经过身份验证的攻击者发送特制URL请求写入任意文件。
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 Desktop | 1.2.0 ~ 1.8.4 | cpe:2.3:a:ibm:langflow_desktop:1.2.0:*:*:*:*:*:*:* |
II. Public POCs for CVE-2026-4502
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · IBM · 2026-04-30 · 14 CVEs total
| CVE-2026-6389 | 8.8 HIGH | IBM Turbonomic Prometurbo agent used by IBM Turbonomic Application Resource Management is |
| CVE-2026-6543 | 8.8 HIGH | Authenticated Remote Code Execution Vulnerability in Langflow Code Validation Endpoint |
| CVE-2026-4503 | 7.5 HIGH | Unauthenticated Insecure Direct Object Reference (IDOR) Vulnerability in Langflow Desktop |
| CVE-2026-1577 | 6.5 MEDIUM | IBM® Db2® is vulnerable to a denial of service with a specially crafted query involving mu |
| CVE-2025-36122 | 6.5 MEDIUM | IBM® Db2® is vulnerable to a denial of service with a specially crafted query when stmthea |
| CVE-2026-6542 | 6.5 MEDIUM | Monitor API allows cross-user read of transaction logs and deletion of build data via flow |
| CVE-2026-3345 | 6.5 MEDIUM | Path Traversal and Arbitrary File Write Vulnerability in IBM Langflow Desktop API v2 File |
| CVE-2026-3340 | 6.5 MEDIUM | Server-Side Request Forgery (SSRF) in Langflow URL Component |
| CVE-2026-2311 | 6.4 MEDIUM | IBM i is affected by a privilege escalation vulnerability in Web Administration GUI [] |
| CVE-2026-3346 | 6.4 MEDIUM | Stored Cross-Site Scripting (XSS) in Langflow Markdown Rendering via rehypeRaw |
| CVE-2025-36335 | 6.2 MEDIUM | Vulnerabilities found |
| CVE-2025-14688 | 5.3 MEDIUM | IBM® Db2® is vulnerable to a denial of service when fetching from certain tables under spe |
| CVE-2025-36180 | 5.3 MEDIUM | Inadequate Pod Communication Restrictions, affects watsonx.data |
IV. Related Vulnerabilities
Same product: Langflow Desktop
- CVE-2026-6543
Authenticated Remote Code Execution Vulnerability in Langflo - CVE-2026-3345
Path Traversal and Arbitrary File Write Vulnerability in IBM - CVE-2026-3346
Stored Cross-Site Scripting (XSS) in Langflow Markdown Rende - CVE-2026-3340
Server-Side Request Forgery (SSRF) in Langflow URL Component - CVE-2026-4503
Unauthenticated Insecure Direct Object Reference (IDOR) Vuln
Same vendor: IBM
- CVE-2026-1577
IBM® Db2® is vulnerable to a denial of service with a specia - CVE-2025-36122
IBM® Db2® is vulnerable to a denial of service with a specia - CVE-2025-14688
IBM® Db2® is vulnerable to a denial of service when fetching - CVE-2026-2311
IBM i is affected by a privilege escalation vulnerability in - CVE-2025-36180
Inadequate Pod Communication Restrictions, affects watsonx.d
Same weakness: CWE-22
- CVE-2026-8274
npitre cramfs-tools Directory cramfsck.c do_directory path t - CVE-2022-50956
WordPress Plugin amministrazione-aperta 3.7.3 Local File Rea - CVE-2026-8215
Industrial Application Software IAS Canias ERP RMI iasReques - CVE-2026-42605
AzuraCast: Path Traversal in `currentDirectory` Parameter En - CVE-2026-42574
apko dirFS has a symlink-following path traversal that allow
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