Auth bypass in Budibase Server
CVE-2026-82239
Budibase before 3.41.3 fails to enforce per-table role restrictions on the POST /api/datasources/query endpoint, allowing low-privilege BASIC users to read, create, update, or delete rows in any table regardless of configured permissions. Attackers with BASIC role can submit crafted query requests with target table identifiers to bypass table-level access controls and manipulate restricted data.
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: 0.003 (26.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.2% 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: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/Budibase/budibase/security/advisories/GHSA-vq3j-xwg3-pg8x (vendor-advisory)
- www.vulncheck.com/advisories/budibase-before-3.41.3-authorization-bypass-via-da… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82239?
- CVE-2026-82239 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-2026-82239?
- High severity. CVSS v3 base score is 8.1 out of 10.