Arbitrary File Upload Vulnerability in FlowiseAI Flowise Product

CVE-2025-26319

What is CVE-2025-26319?

CVE-2025-26319 is a significant security vulnerability identified in the FlowiseAI Flowise product, specifically in version 2.2.6. This product is designed for workflow automation and AI integrations. The vulnerability allows for arbitrary file uploads through the /api/v1/attachments endpoint, which can pose serious threats to organizations using the software. Malicious actors could exploit this flaw to upload harmful files, potentially compromising system integrity, leading to unauthorized access or data breaches, thereby negatively impacting operational security and data confidentiality.

Technical Details

The arbitrary file upload vulnerability in CVE-2025-26319 arises from insufficient validation mechanisms within the FlowiseAI Flowise product. Specifically, the issue is located in the API endpoint responsible for handling attachments. This weakness allows attackers to bypass file upload restrictions, enabling them to upload files that could execute arbitrary commands or deploy malicious scripts on the server, leading to more extensive exploitation of the system.

Potential Impact of CVE-2025-26319

1. Data Breach Risks: Successful exploitation of this vulnerability could allow attackers to upload malicious files that may facilitate unauthorized access to sensitive data, thereby increasing the risk of data breaches and information leaks.

2. System Compromise: The arbitrary file upload can lead to remote code execution on the affected system, granting attackers unauthorized control and the ability to manipulate system operations and configurations.

3. Reputation Damage and Financial Loss: Organizations experiencing a security breach due to this vulnerability could face significant reputational damage, loss of customer trust, and potential financial repercussions from regulatory penalties and remediation efforts.

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