CVE-2026-31816 — AI Deep Analysis Summary

🚨 **Essence**: Budibase has a critical **Authentication Bypass** vulnerability. The `authorized()` middleware fails to properly validate webhook paths.…

🛡️ **Root Cause**: **CWE-74** (Improper Neutralization of Special Elements). <br>🔍 **Flaw**: The regex in the `authorized()` middleware is **unanchored**.…

📦 **Affected**: **Budibase** (Low-code platform). <br>📅 **Versions**: **3.31.4 and earlier**. <br>🏢 **Vendor**: Budibase (UK-based open-source project).

🕵️ **Attacker Actions**: <br>1️⃣ Access **ANY** server-side API endpoint without credentials. <br>2️⃣ Read sensitive internal data (High Confidentiality impact).…

⚡ **Threshold**: **LOW**. <br>🔓 **Auth**: None required (PR:N). <br>🌐 **Network**: Remote (AV:N). <br>🖱️ **UI**: None required (UI:N). <br>🎯 **Complexity**: Low (AC:L). Just a crafted URL is enough.

🔓 **Exploitation**: **YES**, Public PoCs exist. <br>🔗 **Sources**: <br>- Vulhub (Dockerized test env) <br>- Awesome-POC repo <br>- ProjectDiscovery Nuclei templates <br>🚀 **Status**: Easy to exploit with standard tools.

🔍 **Self-Check**: <br>1️⃣ Check your Budibase version (must be ≤ 3.31.4). <br>2️⃣ Use **Nuclei** with the CVE-2026-31816 template.…

🩹 **Fix**: **YES**, officially patched. <br>📢 **Advisory**: GHSA-gw94-hprh-4wj8 on GitHub Security Advisories. <br>✅ **Action**: Upgrade to a version **newer than 3.31.4** immediately.

🛑 **No Patch Workaround**: <br>1️⃣ **WAF Rules**: Block query strings containing known webhook path patterns. <br>2️⃣ **Network**: Restrict access to Budibase API endpoints to trusted IPs only.…

🚨 **Urgency**: **CRITICAL**. <br>📊 **CVSS**: High (C:H, I:H). <br>⏳ **Priority**: **Immediate Patching Required**. Since it allows full API bypass with zero authentication, this is a top-priority security incident.…