Cross-Tenant Information Disclosure in Budibase Server
CVE-2026-100688

7.1HIGH

Key Information:

Vendor

Budibase

Status
Server
Vendor
CVE Published:
26 September 2026

What is CVE-2026-100688?

Budibase server versions prior to 3.45.0 are susceptible to a cross-tenant information disclosure vulnerability through the GET /api/applications/:appId/appPackage endpoint. This issue allows authenticated users to exploit the system by accessing another tenant's application metadata and source code without proper authorization checks. Attackers can manipulate requests to retrieve sensitive details such as navigation structures, role names, internal screen URLs, and JavaScript snippets potentially exposing user identifiers, leading to significant privacy and security concerns.

Affected Version(s)

server 0 < 3.45.0

server 3.45.0

References

https://github.com/Budibase/budibase/security/advisories/...
vendor-advisory
https://www.vulncheck.com/advisories/budibase-server-befo...
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Hasinohacker
.