Privilege escalation in Budibase Server
CVE-2026-100686
Budibase versions before 3.45.0 fail to validate per-app authorization in the POST /api/global/groups/:groupId/apps endpoint, allowing builders to assign application roles across workspace boundaries. A builder of a single workspace can exploit missing per-app authorization checks to grant themselves admin roles in other workspaces by modifying user group role mappings.
Vulnerability class: Privilege Escalation
Published .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/Budibase/budibase/security/advisories/GHSA-pp5r-q4fp-mcj3 (vendor-advisory)
- www.vulncheck.com/advisories/budibase-before-3.45.0-cross-workspace-privilege-e… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100686?
- CVE-2026-100686 is a high-severity vulnerability in Budibase Server, classified under Improper Privilege Management. CVSS score: 8.1/10. Published 2026-09-26.
- How severe is CVE-2026-100686?
- High severity. CVSS v3 base score is 8.1 out of 10.