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CVE-2026-1126— lwj flow SVG File FormResource.java uploadFile unrestricted upload

Quick assessment

Affected
lwj flow
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.

Flow是中国lwj个人开发者的一个免费开源的企业级流程应用，结合了Flowable等主流技术开发，一种流程引擎一体化解决方案。 Flow存在代码问题漏洞，该漏洞源于对组件SVG File Handler中文件flow-masterflow-front-restsrcmainjavacomdragonflowweb esourceflowFormResource.java的参数File的错误操作，可能导致任意文件上传。

CVSS 6.3 · Medium EPSS 0.26% · P15

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-1126

Vulnerability Information
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Vulnerability Title
lwj flow SVG File FormResource.java uploadFile unrestricted upload
Source: CVE Program / CVE List V5
Vulnerability Description
A security vulnerability has been detected in lwj flow up to a3d2fe8133db9d3b50fda4f66f68634640344641. This affects the function uploadFile of the file \flow-master\flow-front-rest\src\main\java\com\dragon\flow\web\resource\flow\FormResource.java of the component SVG File Handler. The manipulation of the argument File leads to unrestricted upload. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. This product adopts a rolling release strategy to maintain continuous delivery. Therefore, version details for affected or updated releases cannot be specified. The project was informed of the problem early through an issue report but has not responded yet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
Flow 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Flow是中国lwj个人开发者的一个免费开源的企业级流程应用，结合了Flowable等主流技术开发，一种流程引擎一体化解决方案。 Flow存在代码问题漏洞，该漏洞源于对组件SVG File Handler中文件flow-masterflow-front-restsrcmainjavacomdragonflowweb esourceflowFormResource.java的参数File的错误操作，可能导致任意文件上传。
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
lwj flow a3d2fe8133db9d3b50fda4f66f68634640344641 -

II. Public POCs for CVE-2026-1126

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III. Intelligence Information for CVE-2026-1126

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Vendor Advisories for CVE-2026-1126 (3)

IV. Related Vulnerabilities

Same product: flow
Same weakness: CWE-434

V. Comments for CVE-2026-1126

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