CVE-2025-26319 — AI Deep Analysis Summary

🚨 **Essence**: Flowise AI v2.2.6 has an **Arbitrary File Upload** flaw. 📂 💥 **Consequences**: Attackers can overwrite critical config files (like `api.json`) or upload Webshells.…

🛡️ **Root Cause**: The `/api/v1/attachments` route is **whitelisted** (no auth required). 🚫 ⚠️ **Flaw**: It fails to sanitize the `chatId` parameter, allowing **Path Traversal** (`../../../`).…

🎯 **Affected**: **Flowise AI** versions **2.2.6 and below**. 📦 ⚙️ **Component**: Specifically when `storageType` is set to **local** (the default setting). 📂

🕵️ **Privileges**: **Unauthenticated** access. No login needed! 🔓 📊 **Data Impact**: 1. Read/Write **Arbitrary Files**. 2. Steal **API Keys** by overwriting `api.json`. 3.…

📉 **Threshold**: **LOW**. 📉 ✅ **Auth**: None required (Whitelisted route). ⚙️ **Config**: Works on default settings (`storageType: local`). 🎯 **Ease**: Simple script execution. 🚀

🔓 **Public Exp?**: **YES**. ✅ 📜 **PoCs**: Multiple Python scripts available on GitHub (e.g., `flowise_exploit.py`). 🌐 **Wild Exp**: Active exploitation tools exist for uploading shells or configs. 🕸️

🔍 **Self-Check**: 1. Scan for Flowise instances on port **3000**. 🌐 2. Check if `/api/v1/attachments` is accessible without auth. 🚪 3. Use Nuclei templates (`CVE-2025-26319.yaml`) for automated detection. 🤖

🛠️ **Fix**: Update to a **patched version** > 2.2.6. 📦 🚫 **Mitigation**: If stuck, disable the `/api/v1/attachments` endpoint or enforce **Authentication** on all API routes. 🔐

🚧 **No Patch?**: 1. **Block** external access to port 3000 via Firewall. 🧱 2. Change `storageType` to **S3/Cloud** if supported (avoids local path traversal). ☁️ 3. Restrict file upload permissions in the OS. 📜

🔥 **Urgency**: **CRITICAL**. 🔥 ⚡ **Priority**: **P1**. 📢 **Reason**: Unauthenticated + RCE + Config Overwrite = **Immediate Compromise**. Patch NOW! ⏳