Auth bypass in Budibase Server
CVE-2026-82240
Budibase before 3.41.3 fails to validate app-scoped builder role assignments in the public user create and update endpoints, allowing an authenticated app-scoped builder to grant builder access to unrelated apps. Attackers can submit crafted requests to the user update API with builder.apps fields to escalate privileges and gain unauthorized builder access to other applications in the same tenant.
Vulnerability class: Broken Access Control
Published · last modified .
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
EPSS: 0.004 (28.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/Budibase/budibase/security/advisories/GHSA-468g-55qj-v8rr (vendor-advisory)
- www.vulncheck.com/advisories/budibase-before-3.41.3-privilege-escalation-via-us… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82240?
- CVE-2026-82240 is a high-severity vulnerability in Budibase Server, classified under Missing Authorization. CVSS score: 8.1/10. Published 2026-08-28.
- How severe is CVE-2026-82240?
- High severity. CVSS v3 base score is 8.1 out of 10.