Auth bypass in Dbgate
CVE-2026-121455
DbGate before 7.3.3 contains a missing authorization vulnerability that allows connection-restricted authenticated users to bypass LOGIN_PERMISSIONS because test() and save() never call testConnectionPermission. Attackers can submit arbitrary connection definitions to POST /connections/test to probe internal database hosts, or to /connections/save to overwrite stored connections.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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/dbgate/dbgate/issues/1601 (issue-tracking)
- github.com/dbgate/dbgate (product)
- github.com/dbgate/dbgate/commit/9166a987bfec (patch)
- github.com/dbgate/dbgate/blob/v7.3.2/packages/api/src/controllers/connections.js (technical-description)
- github.com/dbgate/dbgate/blob/v7.3.2/packages/api/src/controllers/connections.js (technical-description)
- www.vulncheck.com/advisories/dbgate-before-7.3.3-missing-authorization-via-conn… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-121455?
- CVE-2026-121455 is a medium-severity vulnerability in Dbgate, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-11-03.
- How severe is CVE-2026-121455?
- Medium severity. CVSS v3 base score is 5.4 out of 10.