CVE-2026-4503— Unauthenticated Insecure Direct Object Reference (IDOR) Vulnerability in Langflow Desktop Image Download Endpoint
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I. Basic Information for CVE-2026-4503
Vulnerability Information
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Vulnerability Title
Unauthenticated Insecure Direct Object Reference (IDOR) Vulnerability in Langflow Desktop Image Download Endpoint
Source: NVD (National Vulnerability Database)
Vulnerability Description
IBM Langflow Desktop 1.0.0 through 1.8.4 Langflow could allow an unauthenticated user to view other users' images due to an indirect object reference through a user-controlled key.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: NVD (National Vulnerability Database)
Vulnerability Title
IBM Langflow Desktop 安全漏洞
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 1.0.0版本至1.8.4版本存在安全漏洞，该漏洞源于通过用户控制密钥的间接对象引用，可能导致未经身份验证的用户查看其他用户的图像。
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 | 1.0.0 ~ 1.8.4 | cpe:2.3:a:ibm:langflow_desktop:1.0.0:*:*:*:*:*:*:* |
II. Public POCs for CVE-2026-4503
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|---|
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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-2026-1577 | 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-2026-4502 | 6.5 MEDIUM | Arbitrary File Write and Remote Code Execution Vulnerability in Langflow v2 API |
| 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-2026-4502
Arbitrary File Write and Remote Code Execution Vulnerability
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-639
- CVE-2026-8196
JeecgBoot mLogin Endpoint LoginController.java authorization - CVE-2026-42291
SysReptor: Read-write access to personal notes by sharing-li - CVE-2026-44400
MailEnable Enterprise Premium < 10.55 Authorization Bypass v - CVE-2026-42279
solidtime: Time entry update endpoint allows cross-organizat - CVE-2026-42277
Onyx: IDOR in /chat/file/{file_id} allows any authenticated
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