Auth bypass in Budibase Server
CVE-2026-100685
Budibase before 3.45.0 fails to properly scope the GET /api/chat-links endpoint by workspace, allowing builders to enumerate chat identity link records across all workspaces in a tenant. Attackers with builder access to a single workspace can retrieve sensitive chat identity linking data including user IDs and external chat service identifiers from other workspaces they have no permission to access.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (18.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-76m3-47v8-p7h6) (vendor-advisory)
- VulnCheck Advisory: Budibase before 3.45.0 Information Disclosure via Chat Links (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100685?
- CVE-2026-100685 is a high-severity vulnerability in Budibase Server, classified under Incorrect Authorization. CVSS score: 7.7/10. Published 2026-09-26.
- How severe is CVE-2026-100685?
- High severity. CVSS v3 base score is 7.7 out of 10.