FlowiseAI - Arbitrary File Upload (CVE-2025-26319)

CVE-2025-26319 is a critical vulnerability in FlowiseAI Flowise that permits arbitrary file upload via a vulnerable attachments API endpoint, which can be abused to potentially achieve remote code execution.

CrowdSec has been tracking this vulnerability and its exploits since 28th of May 2025.

Data from the CrowdSec community indicates that exploitation of CVE-2025-26319 is highly selective and intelligence-driven. Threat actors use advanced reconnaissance and carefully choose their targets, often as part of sophisticated campaigns or advanced persistent threat operations. In addition, according to the CrowdSec network, attack volume against CVE-2025-26319 has dipped slightly compared to the previous week. Although still commonly targeted, the decline suggests a cooling-off period. Long-term relevance remains, but attention is waning.

Exploitation attempts are typically identifiable through requests to URLs containing /api/v1/attachments/ alongside path traversal sequences.