---
cve: "CVE-2026-100683"
severity: "HIGH"
cvss: 8.9
epss: "0.2%"
vendor: "budibase"
kev: false
exploited: false
published: "2026-09-26 14:16:52"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-05T05:16:08+02:00"
---

# CVE-2026-100683

> 8.9 HIGH · 🧪 PoC

## Beschreibung

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.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-09-28 17:57:00
- CNA-CVSS: **8.9** (`CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Gering | warn |

## Patch verfügbar (OSV)

- 2790401d5070fd5f71145683034ef333699bf8d3 (Commit)

## BSI-Hinweise (deutsch)

- [Budibase: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-3286) — _BSI-Einstufung: kritisch_
  Ein Angreifer kann mehrere Schwachstellen in Budibase ausnutzen, um erweiterte Berechtigungen zu erlangen, Sicherheitsmaßnahmen zu umgehen, SQL-Injection-Angriffe durchzuführen oder Daten zu manipulieren und offenzulegen.

## Referenzen

- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-100683) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_