CVE-2026-100683 — Budibase (@budibase/server) before 3.45.0 builds MySQL and MSSQL column-rename DDL in…¶

Key facts

CVE-2026-100683 is a High (8.0) vulnerability: Budibase (@budibase/server) before 3.45.0 builds MySQL and MSSQL column-rename DDL in…. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-100683
Severity	High (8.0)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-100683/

Details¶

English | 한국어

Description¶

Budibase (@budibase/server) before 3.45.0 builds MySQL and MSSQL column-rename DDL in packages/backend-core/src/sql/sqlTable.ts by interpolating identifiers directly into a raw query string (backtick-quoted for MySQL, a single-quoted sp_rename literal for MSSQL) without applying the project's quoteMySqlIdentifier / quoteSqlServerIdentifier helpers. An attacker with DDL rights on a connected MySQL/MSSQL datasource can create a column whose name contains a backtick (MySQL) or single quote (MSSQL) plus additional SQL; Budibase's schema introspection stores the name verbatim, and when a Budibase builder later renames that column through the UI (POST /api/tables with _rename.old), the embedded quote character terminates the identifier and the injected SQL is executed. Because the MySQL connection is opened with multipleStatements: true, stacked statements run as Budibase's datasource user, allowing arbitrary reads, writes, or destructive operations on the connected database outside Budibase's row/table permission model. Fixed in 3.45.0.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-100683
Type	SQLI
CVSS Score	8.0

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-100683/poc.py

Usage¶

# Run PoC against target
python3 poc.py --target <TARGET_URL>

# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>

⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.

Test Lab¶

This repository includes a Docker-based test environment with both vulnerable and patched applications.

Quick Start¶

# Clone and navigate to CVE directory
cd CVE-2026-100683

# Start both applications
docker-compose up -d

# Run tests
./run-tests.sh    # Linux/Mac
./run-tests.ps1   # Windows PowerShell

Application Endpoints¶

Application	URL	Status
Vulnerable App	http://localhost:8080	Shows vulnerability
Patched App	http://localhost:8081	Demonstrates fix

Directory Structure¶

├── README.md           # English documentation
├── README_KO.md        # Korean documentation
├── poc.py              # PoC detection script
├── docker-compose.yml  # Container orchestration
├── run-tests.sh        # Linux/Mac test runner
├── run-tests.ps1       # Windows test runner
├── vulnerable-app/     # Vulnerable version
│   ├── app.py
│   ├── Dockerfile
│   └── requirements.txt
└── patched-app/        # Fixed version
    ├── app.py
    ├── Dockerfile
    └── requirements.txt

References¶

https://github.com/Budibase/budibase/security/advisories/GHSA-ppj8-hmx2-m546
https://www.vulncheck.com/advisories/budibase-before-3.45.0-sql-injection-via-column-rename-ddl

Generated by PoC Generator on 2026-09-27T02:33:57.236379318

Frequently asked questions¶

What is CVE-2026-100683?¶

CVE-2026-100683 is a High (8.0) vulnerability: Budibase (@budibase/server) before 3.45.0 builds MySQL and MSSQL column-rename DDL in…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-100683?¶

Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.

How do I block or mitigate CVE-2026-100683?¶

Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.

For authorized security testing and research only. See the full source and NVD record.